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Nitecore UM4 Facts: 150 Specifications & 109 Highlights

Before you buy the Nitecore UM4 charger, take a minute to explore its 150 specs & features — from core specs to standout features like general information, electrical & power, charging performance & ports & connectivity.

Supermod

Andini E. U.

509 Products

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Ivi Meiccel Vidia

2432 Products

62 Points

Nitecore

Nitecore UM4

Highlights ¹⁰⁹

No extras. Just what matters.

                                
                                                    62
                                                
                                                    Points
                                                
                                        Nitecore UM4

Why is Nitecore UM4 better than other chargers ?

General Information Electrical & Power Charging Performance Ports & Connectivity Physical Dimensions & Weight Build Quality & Materials Safety & Protection Features Compatibility & Standards Thermal & Environmental Performance Usability & Convenience Durability & Reliability Energy & Efficiency Compliance Warranty & Support

General Information

Released in 2018 The year the charger model was first released to market.
Certified with RoHS, CE, FCC Standards Lists official safety, quality, and compliance certifications held by the charger.
Product Name: Nitecore UM4 Official product name used to identify the charger model.
Charger Type: Multi-Port Charger Defines the primary charger category based on form and usage.
Charging Technology: Standard Charging Indicates the core technology used to deliver power efficiently.
Suitable for Indoor Environments Specifies the environments where the charger is designed to operate.
Ideal for Home,Office,Travel Usage Describes where and how the charger is primarily intended to be used.
Works Well with Accessory Devices Indicates the types of devices the charger can power.
Powered via USB Power Defines where the charger draws its power from.
Installation Type: Desktop Describes how the charger is installed or connected.
Mounting Style: Desktop Indicates how the charger is physically positioned during use.
Approved for use in Global regions. Indicates the regions where the charger meets regulatory standards.
User Level: Beginner Describes the technical experience level required to use the charger effectively.

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Electrical & Power

8.32 Hz wider input frequency support The electrical frequency range the charger can accept. 60.0 Hz vs 51.7 Hz
6.57 Watt lower minimum output power The lowest stable power output supported by the charger. 1.5 Watt vs 8.1 Watt
0.46 A lower input current draw The amount of current drawn from the power source during operation. 2.0 A vs 2.5 A
Power Efficiency: High Indicates how effectively input power is converted into usable output power.
Power Factor: Medium Indicates how efficiently electrical power is drawn from the power source.
Voltage Regulation: Good Indicates how well output voltage remains stable under varying load conditions.
Current Regulation: Excellent Indicates how consistently current is controlled during charging.
Load Regulation: Good Measures output stability as load increases or decreases.
Ripple & Noise: Low Indicates the level of electrical noise present in the output.
Surge Protection Rating: Enhanced Indicates the strength of protection against voltage spikes.
Offers Short Circuit Protection Automatically shuts down power if a short circuit is detected. with a difference of 68.0 points
Overcurrent Protection Available Prevents damage by limiting excessive current flow. with a difference of 68.0 points
Provides Overvoltage Protection Protects devices from excessive voltage output. with a difference of 68.0 points

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Charging Performance

Charges up to 4 Devices at Once The maximum number of devices that can be charged at the same time.
Charging Speed: Fast Classifies overall charging speed based on supported power and protocols.
Uses Dynamic Power Distribution Describes how power is allocated across multiple ports.
Intelligent Power Allocation Available Automatically adjusts power delivery based on connected devices. with a difference of 70.0 points
Charging Stability: Stable Reflects how consistent charging output remains over time.
Heat Management Efficiency: High Measures how effectively heat is managed during charging.
Throttling Behavior: Gradual Describes how charging speed is reduced when limits are reached.
Charging Consistency: Consistent Indicates how evenly charging speed is maintained throughout a session.
Idle Charging Behavior: Standby Describes behavior when a device is fully charged but still connected.
Supports Adaptive Charging Adjusts charging patterns based on device needs and conditions. with a difference of 68.0 points
Device Detection Accuracy: High Accuracy in identifying connected devices and their power needs.

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Ports & Connectivity

Offers 4 Ports Total number of output ports available for charging devices.
Includes 1 USB-A Ports Number of traditional USB-A output ports.
Port Placement: Front Location of charging ports on the charger body.
Connector Type: USB-A Types of connectors supported by the charger.
Detachable Cable Indicates whether the charging cable can be detached. with a difference of 75.0 points
Clearly Labeled Ports Indicates whether ports are clearly labeled for identification. with a difference of 69.0 points
Port Durability: High Expected resistance of ports to wear from repeated use.
Connector Durability: High Durability of the connector interface itself.
Port Power Priority: Auto Determines how power priority is assigned among ports.

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Physical Dimensions & Weight

0.56 inch shorter height The vertical measurement of the charger from bottom to top. 1.6 inch vs 2.2 inch
0.1 lbs lighter weight Total weight of the charger including built-in components. 0.3 lbs vs 0.4 lbs
Travel Size Classification: Compact Overall size category based on dimensions and portability.

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Build Quality & Materials

Fire-Retardant Rating: V-0 Fire safety rating of the charger materials.
Port Reinforcement: Reinforced Indicates whether charging ports are reinforced for durability.
Housing Material: Plastic Primary material used for the outer charger casing.
Plug Material: Plastic,Metal Material used for the plug prongs and structure.
Heat-Resistant Materials Uses materials designed to withstand high temperatures safely. with a difference of 67.0 points
Surface Finish: Matte External surface finish affecting grip and aesthetics.
Build Rigidity: Solid Overall structural stiffness of the charger body.
Scratch Resistance: Medium Resistance of the surface to scratches and abrasions.
Material Sustainability Level: Medium Use of sustainable or environmentally friendly materials.

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Safety & Protection Features

Provides Overheat Protection Automatically reduces or shuts off power when excessive heat is detected. with a difference of 68.0 points
Temperature Monitoring Available Continuously monitors internal temperature during operation. with a difference of 68.0 points
Includes Fire Protection Built-in measures to reduce fire risk during electrical faults. with a difference of 68.0 points
Electrical Isolation Available Separates high-voltage and low-voltage components for safety. with a difference of 68.0 points
Provides Anti-Spark Protection Reduces sparking when plugging or unplugging devices. with a difference of 68.0 points
Includes EMI Protection Protects against electromagnetic interference affecting nearby electronics. with a difference of 68.0 points
Includes ESD Protection Shields the charger from electrostatic discharge damage. with a difference of 68.0 points
Features Auto Shut-Off Automatically cuts power when unsafe conditions are detected. with a difference of 67.0 points
Provides Fault Detection Detects abnormal electrical conditions during operation. with a difference of 68.0 points
Safety Redundancy Level: Multi-Layer Indicates the number of safety systems working together.
Safety Certification Level: Enhanced Overall strength of safety certifications achieved.
Features Thermal Fail-Safe Mode Emergency mode that safely disables charging during extreme heat. with a difference of 67.0 points

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Compatibility & Standards

Supports Quick Charge Indicates compatibility with Qualcomm Quick Charge technology. with a difference of 69.0 points
Backward Compatible Maintains compatibility with older charging standards and devices. with a difference of 69.0 points
Cross-Brand Compatibility: Universal Level of compatibility across different device brands.

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Thermal & Environmental Performance

Operating Temperature Range: 32–104°F The temperature range within which the charger operates safely.
Thermal Dissipation Method: Passive Method used to release heat during operation.
Internal Cooling Design: Airflow Channels Internal structure designed to manage heat.
Storage Temperature Range: -4–140°F Temperature range safe for storing the charger when not in use.
Fanless Design Indicates whether cooling is achieved without a fan. with a difference of 68.0 points
Ambient Temperature Tolerance: Medium Ability to perform in varying ambient temperatures.
Energy Loss as Heat: Moderate Percentage of input energy lost as heat during charging.
Sustained Load Temperature Stability: Stable Temperature stability during prolonged high-load charging.

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Usability & Convenience

Cable Management: External How the charging cable is managed when not in use.
Indicator Behavior: Color-Coded How indicator lights behave during operation.
User Feedback Method: LED Methods used to communicate status to the user.
Setup Complexity: Plug-and-Play Effort required to start using the charger.
Plug Orientation: Straight Orientation of the plug relative to the charger body.
LED Indicators Available Presence of LED lights to show charging or power status. with a difference of 72.0 points
Supports One-Hand Operation Allows easy plugging and unplugging with one hand. with a difference of 67.0 points
Travel Friendly Designed for easy transport and use while traveling. with a difference of 68.0 points
Maintenance Requirements: Low Level of maintenance needed to keep the charger functioning well.
Daily Use Convenience: High Overall convenience during everyday use.

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Durability & Reliability

Manufacturing Quality Level: Premium Overall manufacturing quality classification.
Rated Lifespan: Long Expected operational lifespan of the charger under normal usage conditions.
Mean Time Between Failures: High Average reliability level indicating how often failures are expected.
Plug Insertion Cycles: High Indicates how many plug-in and unplug cycles the charger connector is designed to withstand before wear affects performance.
Port Wear Resistance: High Resistance of charging ports to wear over time.
Cable Flex Cycles: Medium Indicates how many bending cycles the charging cable can withstand before performance degradation.
Long-Term Stability: Stable Performance consistency over extended use periods.
Environmental Stress Resistance: Medium Ability to withstand heat, humidity, and other stresses.
Reliability Certified Indicates whether reliability has been independently certified. with a difference of 69.0 points

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Energy & Efficiency Compliance

Energy Efficiency Rating: High Overall classification of how efficiently the charger converts power.
Standby Efficiency: High Indicates how efficiently the charger uses power while plugged in but not actively charging.
Power Loss Rating: Low Indicates the amount of input power lost during conversion and operation.
Carbon Footprint Category: Medium Estimated environmental impact from production and use.
Offers Energy Saving Features Built-in features designed to reduce energy consumption. with a difference of 68.0 points

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Warranty & Support

Has 1 Year Warranty Duration of warranty coverage provided with the charger.
Customer Support Availability: Business Hours Availability of customer support services.
Support Channels: Email,Online Portal Ways users can contact customer support.
Replacement Policy: Limited Returns Defines the terms under which a defective or faulty charger can be replaced.

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Comparisons ²

Make your choice now!

Nitecore D4 vs UM4

Nitecore UM4 vs UMS4

Quick Take

The essentials that matter—nothing extra

A fast snapshot of the Nitecore UM4, covering its standout specification and what you can expect right out of the box.

Nitecore UM4

The Nitecore UM4 is an intelligent USB charger capable of charging four batteries at the same time with a total maximum output of 3,000mA. It features a clear LCD screen that displays real-time information such as battery health, charging status, and internal resistance to keep you fully informed. This versatile device is compatible with a massive range of battery types, including Li-ion, Ni-MH, and Ni-Cd, ensuring all your rechargeable cells stay ready for action.

Specifications & Facts ¹⁵⁰

Specs measured. Drama avoided.

Specs, performance, and value — we unpacked the Nitecore UM4 charger across every angle. See how it stacks up against other chargers.

General Information ¹⁵

Nitecore UM4 Release Year

What year was this charger released?

38 Nitecore UM4 0 Votes 2018

15 Chargers in this range 2024

Nitecore UM4

Released in the year 2018, reflecting technology and standards relevant from that period.

The year the charger model was first released to market.

Nitecore UM4 Certifications

What certifications does this charger have?

53 Nitecore UM4 0 Votes RoHS, CE, FCC

12 Chargers in this range CE, FCC, RoHS

Nitecore UM4

Certified with RoHS, CE, and FCC marks showing compliance with environmental, safety, and electromagnetic standards.

Lists official safety, quality, and compliance certifications held by the charger.

Nitecore UM4 Product Name

What is the product name?

63 Nitecore UM4 0 Votes Nitecore UM4

15 Chargers in this range Anker 715

Official product name used to identify the charger model.

Nitecore UM4 Charger Type

What type of charger is this?

63 Nitecore UM4 0 Votes Multi-Port Charger

12 Chargers in this range Wall Charger

Defines the primary charger category based on form and usage.

Nitecore UM4 Charging Technology

What charging technology does it use?

23 Nitecore UM4 0 Votes Standard Charging

14 Chargers in this range Fast Charging

Indicates the core technology used to deliver power efficiently.

Nitecore UM4 Compatibility Notes

Are compatibility notes clearly provided?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Indicates whether additional compatibility limitations or requirements are clearly disclosed.

Nitecore UM4 Usage Environment

Where can this charger be used?

43 Nitecore UM4 0 Votes Indoor

10 Chargers in this range Indoor

Specifies the environments where the charger is designed to operate.

Nitecore UM4 Product Form Factor

What is the product form factor?

0 Nitecore UM4 0 Votes Standard

11 Chargers in this range Compact

Describes the overall physical form and size profile of the charger.

Nitecore UM4 Intended Use

What is the intended use of this charger?

68 Nitecore UM4 0 Votes Home, Office, Travel

15 Chargers in this range Home, Office, Travel

Describes where and how the charger is primarily intended to be used.

Nitecore UM4 Device Compatibility

What devices are compatible with this charger?

43 Nitecore UM4 0 Votes Accessory

16 Chargers in this range Smartphone, Tablet, Laptop, Accessory

Indicates the types of devices the charger can power.

Nitecore UM4 Power Source

What is the power source?

73 Nitecore UM4 0 Votes USB Power

15 Chargers in this range AC Outlet

Defines where the charger draws its power from.

Nitecore UM4 Installation Type

How is the charger installed?

43 Nitecore UM4 0 Votes Desktop

8 Chargers in this range Plug-In

Describes how the charger is installed or connected.

Nitecore UM4 Mounting Style

What is the mounting style?

13 Nitecore UM4 0 Votes Desktop

8 Chargers in this range Desktop

Indicates how the charger is physically positioned during use.

Nitecore UM4 Regulatory Region

Which regulatory regions does it support?

93 Nitecore UM4 0 Votes Global

18 Chargers in this range Global

Indicates the regions where the charger meets regulatory standards.

Nitecore UM4 User Level

What user level is this charger designed for?

13 Nitecore UM4 0 Votes Beginner

4 Chargers in this range Beginner

Describes the technical experience level required to use the charger effectively.

Electrical & Power ¹⁹

Nitecore UM4 Input Voltage

What input voltage does it support?

5 Volt 0 Votes

88.98 Volt (Average)

Nitecore UM4

Designed for an input voltage of 5 Volt, compatible with standard USB power specifications.

The voltage range required from the power source to operate safely.

Nitecore UM4 Output Voltage

What is the output voltage?

4.35 Volt 0 Votes

9.95 Volt (Average)

Nitecore UM4

Output voltage is 4.35 Volt, suitable for safely and efficiently charging a range of devices.

The voltage supplied to connected devices during charging.

Nitecore UM4 Output Current

What is the output current?

1.5 A 0 Votes

2.86 A (Average)

Nitecore UM4

Output current is 1.5 A, sufficient for efficient charging of many mobile devices.

The maximum current delivered to devices for charging.

Nitecore UM4 Standby Power Consumption

How much power is used on standby?

0.5 Watt 0 Votes

0.24 Watt (Average)

Nitecore UM4

Standby power consumption is low at 0.5 Watt, contributing to energy savings when not actively charging devices.

Power consumed when the charger is plugged in but not actively charging.

Nitecore UM4 Peak Power Handling

What peak power can it handle?

15 Watt 0 Votes

38.03 Watt (Average)

Nitecore UM4

Peak power handling of 15 Watt allows the device to manage varying power demands efficiently.

The maximum short-term power the charger can safely handle.

Nitecore UM4 Input Frequency

What input frequency is supported?

60 Hz 0 Votes

51.68 Hz (Average)

Nitecore UM4

Designed to operate at an input frequency of 60 Hz, matching typical regions such as North America.

The electrical frequency range the charger can accept.

Nitecore UM4 Maximum Output Power

What is the maximum output power?

18 Watt 0 Votes

36.85 Watt (Average)

The highest total power the charger can deliver to connected devices.

Nitecore UM4 Minimum Output Power

What is the minimum output power?

1.5 Watt 0 Votes

8.07 Watt (Average)

The lowest stable power output supported by the charger.

Nitecore UM4 Input Current

How much input current does it draw?

2 A 0 Votes

2.46 A (Average)

The amount of current drawn from the power source during operation.

Nitecore UM4 Power Efficiency

How efficient is the charger?

93 Nitecore UM4 0 Votes High

21 Chargers in this range High

Indicates how effectively input power is converted into usable output power.

Nitecore UM4 Power Factor

What is the power factor?

53 Nitecore UM4 0 Votes Medium

19 Chargers in this range High

Indicates how efficiently electrical power is drawn from the power source.

Nitecore UM4 Voltage Regulation

How good is the voltage regulation?

63 Nitecore UM4 0 Votes Good

17 Chargers in this range Good

Indicates how well output voltage remains stable under varying load conditions.

Nitecore UM4 Current Regulation

How good is the current regulation?

93 Nitecore UM4 0 Votes Excellent

18 Chargers in this range Good

Indicates how consistently current is controlled during charging.

Nitecore UM4 Load Regulation

How good is the load regulation?

43 Nitecore UM4 0 Votes Good

15 Chargers in this range Good

Measures output stability as load increases or decreases.

Nitecore UM4 Ripple & Noise

How much ripple and noise is present?

93 Nitecore UM4 0 Votes Low

21 Chargers in this range Low

Indicates the level of electrical noise present in the output.

Nitecore UM4 Surge Protection Rating

How strong is the surge protection?

60 Nitecore UM4 0 Votes Enhanced

15 Chargers in this range Enhanced

Indicates the strength of protection against voltage spikes.

Nitecore UM4 Short Circuit Protection

Does it have short circuit protection?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Automatically shuts down power if a short circuit is detected.

Nitecore UM4 Overcurrent Protection

Is overcurrent protection included?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Prevents damage by limiting excessive current flow.

Nitecore UM4 Overvoltage Protection

Does it prevent overvoltage?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Protects devices from excessive voltage output.

Charging Performance ¹³

Nitecore UM4 Maximum Charging Speed

What is the maximum charging speed?

1.5 Watt 0 Votes

37.23 Watt (Average)

Nitecore UM4

The maximum charging speed is rated at a modest power output of 1.5 Watt, suitable for low-power devices and trickle charging scenarios.

The highest charging power delivered to a single device.

Nitecore UM4 Simultaneous Device Charging

How many devices can be charged simultaneously?

33 Nitecore UM4 0 Votes 4

4 Chargers in this range 2

The maximum number of devices that can be charged at the same time.

Nitecore UM4 Charging Speed

What is the charging speed category?

53 Nitecore UM4 0 Votes Fast

13 Chargers in this range Fast

Classifies overall charging speed based on supported power and protocols.

Nitecore UM4 Power Distribution Method

How is power distributed?

93 Nitecore UM4 0 Votes Dynamic

12 Chargers in this range Dynamic

Describes how power is allocated across multiple ports.

Nitecore UM4 Intelligent Power Allocation

Does it allocate power intelligently?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Automatically adjusts power delivery based on connected devices.

Nitecore UM4 Charging Stability

How stable is the charging performance?

33 Nitecore UM4 0 Votes Stable

8 Chargers in this range Stable

Reflects how consistent charging output remains over time.

Nitecore UM4 Heat Management Efficiency

How efficient is heat management?

93 Nitecore UM4 0 Votes High

19 Chargers in this range High

Measures how effectively heat is managed during charging.

Nitecore UM4 Throttling Behavior

How does the charger throttle performance?

93 Nitecore UM4 0 Votes Gradual

20 Chargers in this range Gradual

Describes how charging speed is reduced when limits are reached.

Nitecore UM4 Charging Consistency

Is charging speed consistent?

93 Nitecore UM4 0 Votes Consistent

21 Chargers in this range Consistent

Indicates how evenly charging speed is maintained throughout a session.

Nitecore UM4 Idle Charging Behavior

What happens after charging is complete?

63 Nitecore UM4 0 Votes Standby

14 Chargers in this range Standby

Describes behavior when a device is fully charged but still connected.

Nitecore UM4 Adaptive Charging

Does it support adaptive charging?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Adjusts charging patterns based on device needs and conditions.

Nitecore UM4 Device Detection Accuracy

How accurate is device detection?

93 Nitecore UM4 0 Votes High

21 Chargers in this range High

Accuracy in identifying connected devices and their power needs.

Nitecore UM4 Startup Charging Delay

Is there a delay before charging starts?

No 0 Votes ~~Nitecore UM4~~

Charger in this range Who knows? (Help us out by suggesting one!)

Time taken before charging begins after a device is connected.

Ports & Connectivity ¹⁷

Nitecore UM4 Total Ports

How many total ports does the charger have?

50 Nitecore UM4 0 Votes 4

5 Chargers in this range 1

Nitecore UM4

Total number of ports is four, allowing simultaneous charging of multiple devices.

Total number of output ports available for charging devices.

Nitecore UM4 USB-A Ports

How many USB-A ports are included?

21 Nitecore UM4 0 Votes 1

5 Chargers in this range 1

Nitecore UM4

Includes exactly one USB-A port, compatible with many legacy and current devices.

Number of traditional USB-A output ports.

Nitecore UM4 Cable Length

How long is the charging cable?

3.28 ft 0 Votes

3.56 ft (Average)

Nitecore UM4

The included cable length is 3.28 ft (1 meter), a practical length for common charging setups.

Length of the included charging cable.

Nitecore UM4 Port Placement

Where are the ports located?

73 Nitecore UM4 0 Votes Front

16 Chargers in this range Front

Nitecore UM4

Ports are positioned on the front for easy access and convenience while charging multiple devices.

Location of charging ports on the charger body.

Nitecore UM4 USB-C Ports

How many USB-C ports does it have?

11 Nitecore UM4 0 Votes 0

12 Chargers in this range 1

Number of USB-C output ports for modern devices.

Nitecore UM4 Wireless Charging

Does it support wireless charging?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Indicates whether the charger supports wireless charging.

Nitecore UM4 Connector Type

What connector types are supported?

53 Nitecore UM4 0 Votes USB-A

17 Chargers in this range USB-C

Types of connectors supported by the charger.

Nitecore UM4 Detachable Cable

Is the cable detachable?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Indicates whether the charging cable can be detached.

Nitecore UM4 Interchangeable Plugs

Does it support interchangeable plugs?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Supports interchangeable plug heads for different regions.

Nitecore UM4 Pass-Through Charging

Does it support pass-through charging?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Allows the charger to power devices while itself being powered.

Nitecore UM4 Port Labeling

Are the ports labeled?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Indicates whether ports are clearly labeled for identification.

Nitecore UM4 Port Durability

How durable are the ports?

93 Nitecore UM4 0 Votes High

19 Chargers in this range High

Expected resistance of ports to wear from repeated use.

Nitecore UM4 Connector Durability

How durable are the connectors?

93 Nitecore UM4 0 Votes High

19 Chargers in this range High

Durability of the connector interface itself.

Nitecore UM4 Magnetic Alignment

Does it support magnetic alignment?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Supports magnetic alignment for easier device placement.

Nitecore UM4 Daisy-Chain

Can it be daisy-chained?

No 0 Votes ~~Nitecore UM4~~

Charger in this range Who knows? (Help us out by suggesting one!)

Allows multiple chargers or devices to be linked together.

Nitecore UM4 Port Power Priority

How is port power priority handled?

93 Nitecore UM4 0 Votes Auto

17 Chargers in this range Auto

Determines how power priority is assigned among ports.

Nitecore UM4 Wireless Charging Power

What is the wireless charging power?

10 Watt 0 Votes

15.11 Watt (Average)

Maximum power delivered during wireless charging.

Physical Dimensions & Weight ⁷

Nitecore UM4 Width

What is the width of the charger?

6.3 inch 0 Votes

3.06 inch (Average)

Nitecore UM4

Width measures 6.3 inch (16.00 cm), sufficiently wide to accommodate multiple ports side by side.

The horizontal measurement of the charger body from side to side.

Nitecore UM4 Depth

What is the depth of the charger?

4.21 inch 0 Votes

2.49 inch (Average)

Nitecore UM4

Depth measures 4.21 inch (10.70 cm), a compact size for desktop or travel use.

The front-to-back measurement of the charger body.

Nitecore UM4 Height

What is the height of the charger?

1.61 inch 0 Votes

2.17 inch (Average)

Nitecore UM4

Height is 1.61 inch (4.09 cm), compact for convenient placement on desks or travel bags.

The vertical measurement of the charger from bottom to top.

Nitecore UM4 Weight

How much does the charger weigh?

0.33 lbs 0 Votes

0.43 lbs (Average)

Nitecore UM4

The charger weighs 0.33 lbs (0.15 kg), making it lightweight and easy to carry for travel or daily use.

Total weight of the charger including built-in components.

Nitecore UM4 Cable Thickness

How thick is the cable?

0 inch 0 Votes

0.12 inch (Average)

Thickness of the charging cable, affecting durability and flexibility.

Nitecore UM4 Plug Profile Depth

How far does the plug stick out?

0 inch 0 Votes

1.09 inch (Average)

Depth of the plug profile when inserted into an outlet.

Nitecore UM4 Travel Size Classification

Is this charger travel-sized?

63 Nitecore UM4 0 Votes Compact

15 Chargers in this range Compact

Overall size category based on dimensions and portability.

Build Quality & Materials ¹¹

Nitecore UM4 Fire-Retardant Rating

What is the fire-retardant rating?

93 Nitecore UM4 0 Votes V-0

22 Chargers in this range V-0

Nitecore UM4

Fire-retardant rating is V-0, indicating excellent resistance to fire and enhancing safety in adverse conditions.

Fire safety rating of the charger materials.

Nitecore UM4 Port Reinforcement

Are the ports reinforced?

93 Nitecore UM4 0 Votes Reinforced

12 Chargers in this range Standard

Nitecore UM4

Ports are reinforced to increase durability and ensure stable connections during frequent plugging and unplugging.

Indicates whether charging ports are reinforced for durability.

Nitecore UM4 Drop Resistance

How drop-resistant is the charger?

3 ft 0 Votes

3.05 ft (Average)

Nitecore UM4

The charger can withstand drops from heights up to 3 ft (0.91 m), adding some durability against accidental falls.

Maximum drop height the charger can withstand without damage.

Nitecore UM4 Housing Material

What is the housing material?

43 Nitecore UM4 0 Votes Plastic

11 Chargers in this range Plastic

Primary material used for the outer charger casing.

Nitecore UM4 Plug Material

What material is the plug made of?

43 Nitecore UM4 0 Votes Plastic, Metal

11 Chargers in this range Metal

Material used for the plug prongs and structure.

Nitecore UM4 Heat-Resistant Materials

Does it use heat-resistant materials?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Uses materials designed to withstand high temperatures safely.

Nitecore UM4 Surface Finish

What is the surface finish?

63 Nitecore UM4 0 Votes Matte

15 Chargers in this range Matte

External surface finish affecting grip and aesthetics.

Nitecore UM4 Build Rigidity

How rigid is the charger build?

93 Nitecore UM4 0 Votes Solid

21 Chargers in this range Solid

Overall structural stiffness of the charger body.

Nitecore UM4 Scratch Resistance

How scratch-resistant is it?

43 Nitecore UM4 0 Votes Medium

11 Chargers in this range Medium

Resistance of the surface to scratches and abrasions.

Nitecore UM4 Moisture Resistance

Is it resistant to moisture?

0 Nitecore UM4 0 Votes None

1 Chargers in this range None

Ability to withstand moisture exposure.

Nitecore UM4 Material Sustainability Level

How sustainable are the materials?

43 Nitecore UM4 0 Votes Medium

9 Chargers in this range Medium

Use of sustainable or environmentally friendly materials.

Safety & Protection Features ¹⁴

Nitecore UM4 Overheat Protection

Does it have overheat protection?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Automatically reduces or shuts off power when excessive heat is detected.

Nitecore UM4 Temperature Monitoring

Is temperature actively monitored?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Continuously monitors internal temperature during operation.

Nitecore UM4 Fire Protection

Does it include fire protection?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Built-in measures to reduce fire risk during electrical faults.

Nitecore UM4 Electrical Isolation

Is electrical isolation implemented?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Separates high-voltage and low-voltage components for safety.

Nitecore UM4 Grounding

Does it support grounding?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Supports grounding to reduce shock and electrical interference.

Nitecore UM4 Child Safety Shutter

Is there a child safety shutter?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Prevents accidental insertion of objects into live ports.

Nitecore UM4 Anti-Spark Protection

Does it have anti-spark protection?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Reduces sparking when plugging or unplugging devices.

Nitecore UM4 EMI Protection

Is EMI protection included?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Protects against electromagnetic interference affecting nearby electronics.

Nitecore UM4 ESD Protection

Is ESD protection supported?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Shields the charger from electrostatic discharge damage.

Nitecore UM4 Auto Shut-Off

Does it shut off automatically?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Automatically cuts power when unsafe conditions are detected.

Nitecore UM4 Fault Detection

Can it detect electrical faults?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Detects abnormal electrical conditions during operation.

Nitecore UM4 Safety Redundancy Level

What is the safety redundancy level?

93 Nitecore UM4 0 Votes Multi-Layer

20 Chargers in this range Multi-Layer

Indicates the number of safety systems working together.

Nitecore UM4 Safety Certification Level

What is the safety certification level?

63 Nitecore UM4 0 Votes Enhanced

16 Chargers in this range Enhanced

Overall strength of safety certifications achieved.

Nitecore UM4 Thermal Fail-Safe Mode

Is there a thermal fail-safe mode?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Emergency mode that safely disables charging during extreme heat.

Compatibility & Standards ¹¹

Nitecore UM4 USB Power Delivery

Does it support USB Power Delivery?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Indicates support for the USB Power Delivery standard for fast and flexible charging.

Nitecore UM4 Quick Charge

Does it support Quick Charge?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Indicates compatibility with Qualcomm Quick Charge technology.

Nitecore UM4 PPS

Does it support PPS?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Supports Programmable Power Supply for efficient fast charging.

Nitecore UM4 Apple Charging

Is it compatible with Apple devices?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Optimized compatibility with Apple devices and charging requirements.

Nitecore UM4 Android Charging

Is it compatible with Android devices?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Ensures compatibility with Android devices and charging protocols.

Nitecore UM4 Laptop Charging

Can it charge laptops?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Indicates whether the charger can power laptops.

Nitecore UM4 Tablet Charging

Does it support tablet charging?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Indicates compatibility with tablets and similar devices.

Nitecore UM4 Wearable Charging

Can it charge wearables?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Supports charging of wearables like smartwatches or earbuds.

Nitecore UM4 Backward Compatibility

Is it backward compatible?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Maintains compatibility with older charging standards and devices.

Nitecore UM4 Proprietary Protocol

Does it support proprietary protocols?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Supports manufacturer-specific charging protocols.

Nitecore UM4 Cross-Brand Compatibility

How broad is cross-brand compatibility?

93 Nitecore UM4 0 Votes Universal

20 Chargers in this range Universal

Level of compatibility across different device brands.

Thermal & Environmental Performance ¹⁰

Nitecore UM4 Operating Temperature Range

What is the operating temperature range?

73 Nitecore UM4 0 Votes 32–104°F

16 Chargers in this range 32–104°F

Nitecore UM4

Operates reliably within a temperature range of 32–104°F (0–40°C), suitable for most indoor environments.

The temperature range within which the charger operates safely.

Nitecore UM4 Thermal Dissipation Method

How does it dissipate heat?

23 Nitecore UM4 0 Votes Passive

6 Chargers in this range Passive

Nitecore UM4

Thermal dissipation is passive, meaning heat is managed without active components like fans, contributing to silent operation.

Method used to release heat during operation.

Nitecore UM4 Internal Cooling Design

What internal cooling design is used?

53 Nitecore UM4 0 Votes Airflow Channels

9 Chargers in this range Heat Sink

Nitecore UM4

Internal cooling uses airflow channels, an effective passive design to dissipate heat without noisy fans.

Internal structure designed to manage heat.

Nitecore UM4 Thermal Throttling Threshold

At what temperature does throttling occur?

140 °F 0 Votes

149.87 °F (Average)

Nitecore UM4

Thermal throttling occurs at 140°F (60°C) to prevent overheating and preserve internal component longevity.

Temperature at which charging power is reduced to prevent overheating.

Nitecore UM4 Storage Temperature Range

What is the storage temperature range?

53 Nitecore UM4 0 Votes -4–140°F

13 Chargers in this range -4–140°F

Temperature range safe for storing the charger when not in use.

Nitecore UM4 Fanless Design

Is the charger fanless?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Indicates whether cooling is achieved without a fan.

Nitecore UM4 Noise Level

How noisy is the charger?

0 dB 0 Votes

0.85 dB (Average)

Operational noise produced during charging.

Nitecore UM4 Ambient Temperature Tolerance

How tolerant is it to ambient temperatures?

43 Nitecore UM4 0 Votes Medium

15 Chargers in this range Medium

Ability to perform in varying ambient temperatures.

Nitecore UM4 Energy Loss as Heat

How much energy is lost as heat?

43 Nitecore UM4 0 Votes Moderate

17 Chargers in this range Low

Percentage of input energy lost as heat during charging.

Nitecore UM4 Sustained Load Temperature Stability

How stable is temperature under sustained load?

93 Nitecore UM4 0 Votes Stable

20 Chargers in this range Stable

Temperature stability during prolonged high-load charging.

Usability & Convenience ¹²

Nitecore UM4 Cable Management

How is the cable managed?

18 Nitecore UM4 0 Votes External

8 Chargers in this range External

Nitecore UM4

Cable management uses an external system, which keeps cables organized outside the charger body.

How the charging cable is managed when not in use.

Nitecore UM4 Indicator Behavior

How do the indicators behave?

63 Nitecore UM4 0 Votes Color-Coded

7 Chargers in this range Solid

Nitecore UM4

Indicator behavior is color-coded, making it easier to understand charging status at a glance.

How indicator lights behave during operation.

Nitecore UM4 User Feedback Method

How does it provide user feedback?

68 Nitecore UM4 0 Votes LED

14 Chargers in this range LED

Nitecore UM4

User feedback is provided through LEDs, offering clear visual signals about the charging process.

Methods used to communicate status to the user.

Nitecore UM4 Setup Complexity

How complex is setup?

83 Nitecore UM4 0 Votes Plug-and-Play

19 Chargers in this range Plug-and-Play

Nitecore UM4

The charger operates with plug-and-play simplicity, requiring no complex setup.

Effort required to start using the charger.

Nitecore UM4 Plug Orientation

What is the plug orientation?

13 Nitecore UM4 0 Votes Straight

4 Chargers in this range Straight

Orientation of the plug relative to the charger body.

Nitecore UM4 Foldable Plug

Does it have a foldable plug?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Indicates whether the plug can fold for easier storage and travel.

Nitecore UM4 LED Indicators

Does it have LED indicators?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Presence of LED lights to show charging or power status.

Nitecore UM4 One-Hand Operation

Can it be operated with one hand?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Allows easy plugging and unplugging with one hand.

Nitecore UM4 Travel Friendly

Is it travel-friendly?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Designed for easy transport and use while traveling.

Nitecore UM4 Maintenance Requirements

Does it require maintenance?

43 Nitecore UM4 0 Votes Low

19 Chargers in this range None

Level of maintenance needed to keep the charger functioning well.

Nitecore UM4 Daily Use Convenience

How convenient is it for daily use?

93 Nitecore UM4 0 Votes High

21 Chargers in this range High

Overall convenience during everyday use.

Nitecore UM4 Firmware Upgradable

Can the firmware be updated?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Indicates whether the charger firmware can be updated.

Durability & Reliability ⁹

Nitecore UM4 Manufacturing Quality Level

What is the manufacturing quality level?

93 Nitecore UM4 0 Votes Premium

19 Chargers in this range Premium

Nitecore UM4

Rated as premium in manufacturing quality, indicating superior build materials and assembly standards.

Overall manufacturing quality classification.

Nitecore UM4 Rated Lifespan

How long is the rated lifespan?

93 Nitecore UM4 0 Votes Long

20 Chargers in this range Long

Expected operational lifespan of the charger under normal usage conditions.

Nitecore UM4 Mean Time Between Failures

How reliable is the charger over time?

93 Nitecore UM4 0 Votes High

20 Chargers in this range High

Average reliability level indicating how often failures are expected.

Nitecore UM4 Plug Insertion Cycles

How durable is the plug connection over time?

93 Nitecore UM4 0 Votes High

19 Chargers in this range High

Indicates how many plug-in and unplug cycles the charger connector is designed to withstand before wear affects performance.

Nitecore UM4 Port Wear Resistance

How resistant are the ports to wear?

93 Nitecore UM4 0 Votes High

19 Chargers in this range High

Resistance of charging ports to wear over time.

Nitecore UM4 Cable Flex Cycles

How durable is the charging cable under repeated bending?

53 Nitecore UM4 0 Votes Medium

9 Chargers in this range Medium

Indicates how many bending cycles the charging cable can withstand before performance degradation.

Nitecore UM4 Long-Term Stability

How stable is long-term performance?

93 Nitecore UM4 0 Votes Stable

21 Chargers in this range Stable

Performance consistency over extended use periods.

Nitecore UM4 Environmental Stress Resistance

How resistant is it to environmental stress?

43 Nitecore UM4 0 Votes Medium

11 Chargers in this range Medium

Ability to withstand heat, humidity, and other stresses.

Nitecore UM4 Reliability Certification

Is reliability certified?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Indicates whether reliability has been independently certified.

Energy & Efficiency Compliance ⁸

Nitecore UM4 Energy Efficiency Rating

What is the energy efficiency rating?

93 Nitecore UM4 0 Votes High

20 Chargers in this range High

Overall classification of how efficiently the charger converts power.

Nitecore UM4 Energy Star Compliance

Is it Energy Star compliant?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Indicates compliance with Energy Star efficiency standards.

Nitecore UM4 Standby Efficiency

How efficient is the charger in standby mode?

93 Nitecore UM4 0 Votes High

20 Chargers in this range High

Indicates how efficiently the charger uses power while plugged in but not actively charging.

Nitecore UM4 Eco Mode

Does it support eco mode?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Reduces power consumption when full charging is not required.

Nitecore UM4 Power Loss Rating

How much power is lost during operation?

93 Nitecore UM4 0 Votes Low

18 Chargers in this range Low

Indicates the amount of input power lost during conversion and operation.

Nitecore UM4 Green Materials Usage

Are green materials used?

No 0 Votes ~~Nitecore UM4~~

Yes Chargers in this range

Uses environmentally friendly or recycled materials.

Nitecore UM4 Carbon Footprint Category

What is the carbon footprint category?

33 Nitecore UM4 0 Votes Medium

9 Chargers in this range Medium

Estimated environmental impact from production and use.

Nitecore UM4 Energy Saving Features

Does it have energy-saving features?

Yes 0 Votes Nitecore UM4

Yes Chargers in this range

Built-in features designed to reduce energy consumption.

Warranty & Support ⁴

Nitecore UM4 Warranty Length

How long is the warranty?

33 Nitecore UM4 0 Votes 1 Year

9 Chargers in this range 1 Year

Nitecore UM4

The charger comes with a 1-year warranty, providing standard coverage for defects and performance issues.

Duration of warranty coverage provided with the charger.

Nitecore UM4 Customer Support Availability

When is customer support available?

23 Nitecore UM4 0 Votes Business Hours

7 Chargers in this range Business Hours

Availability of customer support services.

Nitecore UM4 Support Channels

What support channels are available?

48 Nitecore UM4 0 Votes Email, Online Portal

12 Chargers in this range Email, Online Portal

Ways users can contact customer support.

Nitecore UM4 Replacement Policy

What is the replacement policy?

53 Nitecore UM4 0 Votes Limited Returns

7 Chargers in this range Standard Returns

Defines the terms under which a defective or faulty charger can be replaced.

Surveys

Because hot takes deserve votes.

Nitecore UM4 Charging Speed

How satisfied are you with the charging speed of this chargers when powering everyday devices?

Extremely fast charging — Under 1 hour 0 Votes

Very fast charging — 1 to 2 hours 0 Votes

Decent charging speed — 2 to 4 hours 0 Votes

Slow charging — 4 to 6 hours 0 Votes

Very slow charging — Over 6 hours 0 Votes

Nitecore UM4 Power Output Performance

How well does this chargers provide enough power for phones, tablets, or laptops?

Handles high-demand devices easily — 65 watts or more 0 Votes

Strong and reliable output — 45 to 64 watts 0 Votes

Good for most daily devices — 25 to 44 watts 0 Votes

Limited power capability — 10 to 24 watts 0 Votes

Very weak power delivery — Under 10 watts 0 Votes

Nitecore UM4 Durability and Build Quality

How durable does this chargers feel during long-term daily use?

Feels built to last a long time — Over 5 years 0 Votes

Very solid and dependable — 3 to 5 years 0 Votes

Decently built for regular use — 2 to 3 years 0 Votes

Feels somewhat fragile — 1 to 2 years 0 Votes

Breaks down too quickly — Under 1 year 0 Votes

Nitecore UM4 Portability and Size

How easy is it to carry this chargers for travel or commuting?

Ultra compact and pocketable — Under 3 ounces 0 Votes

Light and travel friendly — 3 to 5 ounces 0 Votes

Moderately easy to carry — 5 to 7 ounces 0 Votes

Somewhat bulky — 7 to 10 ounces 0 Votes

Heavy and inconvenient — Over 10 ounces 0 Votes

Nitecore UM4 Heat Management

How well does this chargers control heat during extended charging sessions?

Stays cool even under heavy use — Under 90 degrees Fahrenheit 0 Votes

Gets slightly warm — 90 to 100 degrees Fahrenheit 0 Votes

Noticeably warm to the touch — 100 to 110 degrees Fahrenheit 0 Votes

Runs quite hot — 110 to 120 degrees Fahrenheit 0 Votes

Uncomfortably hot — Over 120 degrees Fahrenheit 0 Votes

Nitecore UM4 Ease of Use

How easy is it to use this chargers on a daily basis?

Effortless and intuitive — No learning needed 0 Votes

Very easy to understand — Minimal effort 0 Votes

Takes a little getting used to — Some adjustment 0 Votes

Slightly confusing at times — Requires patience 0 Votes

Frustrating to use — Feels complicated 0 Votes

Nitecore UM4 Setup Experience

How smooth is the initial setup experience with this chargers?

Instantly ready to use — Plug and charge 0 Votes

Quick and simple setup — Less than 1 minute 0 Votes

Setup takes some attention — A few minutes 0 Votes

Setup feels awkward — Several minutes 0 Votes

Setup feels annoying — Too many steps 0 Votes

Nitecore UM4 Design and Visual Appeal

How attractive does the design of this chargers look in everyday environments?

Sleek and modern look — Feels premium 0 Votes

Clean and stylish design — Looks nice 0 Votes

Simple and acceptable — Nothing special 0 Votes

Somewhat unattractive — Feels dated 0 Votes

Cheap-looking design — Not appealing 0 Votes

Nitecore UM4 Noise and Comfort

How comfortable is this chargers to use in quiet environments?

Completely silent operation — No noise at all 0 Votes

Almost silent — Barely noticeable 0 Votes

Occasionally noticeable — Slight sound 0 Votes

Clearly noticeable noise — Can be distracting 0 Votes

Annoyingly loud — Very disruptive 0 Votes

Nitecore UM4 Pricing and Value

How do you feel about the price of this chargers compared to what it offers?

Great value for money — Totally worth it 0 Votes

Pretty good price — Feels reasonable 0 Votes

Fair deal overall — Acceptable cost 0 Votes

Kinda pricey — Feels expensive 0 Votes

Crazy expensive — Not worth it 0 Votes

Guides ¹

Yes, we brought proof.

Files ¹

Your New Nitecore UM4 Buddy: A User’s Guide

nitecore.com

5 months ago

Reviews ⁰

The good, the bad, and the brutally honest.

Average Rating

Nitecore

Nitecore UM4

0 / 5 0 Reviews

Discussions ⁰

Thoughts, takes, and hot debates.

Awards ⁰

Only the best made it here.

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Highlights 109

Why is Nitecore UM4 better than other chargers ?

General Information

Electrical & Power

Charging Performance

Ports & Connectivity

Physical Dimensions & Weight

Build Quality & Materials

Safety & Protection Features

Compatibility & Standards

Thermal & Environmental Performance

Usability & Convenience

Durability & Reliability

Energy & Efficiency Compliance

Warranty & Support

Comparisons 2

Quick Take

Nitecore UM4

Specifications & Facts 150

General Information 15

Nitecore UM4 Release Year

Nitecore UM4

Nitecore UM4 Certifications

Nitecore UM4

Nitecore UM4 Product Name

Nitecore UM4 Charger Type

Nitecore UM4 Charging Technology

Nitecore UM4 Compatibility Notes

Nitecore UM4 Usage Environment

Nitecore UM4 Product Form Factor

Nitecore UM4 Intended Use

Nitecore UM4 Device Compatibility

Nitecore UM4 Power Source

Nitecore UM4 Installation Type

Nitecore UM4 Mounting Style

Nitecore UM4 Regulatory Region

Nitecore UM4 User Level

Electrical & Power 19

Nitecore UM4 Input Voltage

Nitecore UM4

Nitecore UM4 Output Voltage

Nitecore UM4

Nitecore UM4 Output Current

Nitecore UM4

Nitecore UM4 Standby Power Consumption

Nitecore UM4

Nitecore UM4 Peak Power Handling

Nitecore UM4

Nitecore UM4 Input Frequency

Nitecore UM4

Nitecore UM4 Maximum Output Power

Nitecore UM4 Minimum Output Power

Nitecore UM4 Input Current

Nitecore UM4 Power Efficiency

Nitecore UM4 Power Factor

Nitecore UM4 Voltage Regulation

Nitecore UM4 Current Regulation

Nitecore UM4 Load Regulation

Nitecore UM4 Ripple & Noise

Nitecore UM4 Surge Protection Rating

Nitecore UM4 Short Circuit Protection

Nitecore UM4 Overcurrent Protection

Nitecore UM4 Overvoltage Protection

Charging Performance 13

Nitecore UM4 Maximum Charging Speed

Nitecore UM4

Nitecore UM4 Simultaneous Device Charging

Nitecore UM4 Charging Speed

Nitecore UM4 Power Distribution Method

Nitecore UM4 Intelligent Power Allocation

Nitecore UM4 Charging Stability

Nitecore UM4 Heat Management Efficiency

Nitecore UM4 Throttling Behavior

Nitecore UM4 Charging Consistency

Nitecore UM4 Idle Charging Behavior

Nitecore UM4 Adaptive Charging

Nitecore UM4 Device Detection Accuracy

Nitecore UM4 Startup Charging Delay

Ports & Connectivity 17

Nitecore UM4 Total Ports

Highlights ¹⁰⁹

Comparisons ²

Specifications & Facts ¹⁵⁰

General Information ¹⁵

Electrical & Power ¹⁹

Charging Performance ¹³

Ports & Connectivity ¹⁷

Physical Dimensions & Weight ⁷

Build Quality & Materials ¹¹

Safety & Protection Features ¹⁴

Compatibility & Standards ¹¹