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Nitecore D2 vs Nitecore UM2: 119 Highlights & 46 Differences — So, Which Charger Actually Works Better

D2 is great for beginners preferring consistent charging. UM2 is for those wanting speed and dual charging. Which one’s your upgrade &#8212 Nitecore D2 or Nitecore UM2? We compared specs like usb-c ports, wireless charging power, interchangeable plugs & width and more to help you choose smarter.

56 Points
Nitecore
Nitecore
Nitecore D2
Nitecore D2
62 Points
Nitecore UM2
vs

Highlights 154

No extras. Just what matters.
56 Points
vs
62 Points

Why is Nitecore D2 better than Nitecore UM2 ?

Scroll down for more facts

Nitecore D2 vs. UM2: Charging Solutions Tailored for Beginners with Distinct Performance Profiles

When exploring battery chargers designed for novices, the Nitecore D2 and UM2 stand out as two compact, indoor-use models that prioritize safety and convenience. Both devices deliver reliable charging technologies compatible across brands with multi-layer safety protections and share a similarly sturdy plastic housing equipped with heat-resistant materials.

Nevertheless, the key distinctions lie in their charging speeds, power management, and feature sets: the D2 employs standard charging delivering up to 10W output power, while the UM2 emphasizes fast charging supporting dual simultaneous device inputs at a higher maximum of 18W. Both are travel-friendly, but the UM2's dynamic power distribution and eco mode optimize energy efficiency and heat management better, offering a modern twist on the classic design.

Nitecore D2: Simplicity and Consistent Charging Reliability

The Nitecore D2 shines as a no-fuss, straightforward charger ideal for users who appreciate tried-and-true technology. Its compact form factor is classified as compact and travel-friendly, weighing a slightly heftier 0.42 lbs but providing stable charging consistency thanks to its fixed power distribution method. Designed for single device charging, the D2 focuses on delivering 4.2V output voltage with moderate heat management efficiency and energy loss rated as medium.

Safety is paramount, backed by instant protection response paired with thermal fail-safe modes and fire protection, mitigating concerns about overheating or electrical faults. Its built-in cable management and LED indicators heighten everyday convenience, though it lacks features such as eco mode or the capability to charge multiple batteries simultaneously.

Nitecore UM2: The Modern Upgrade with Dual Charging and Enhanced Efficiency

The UM2 represents an evolution with its fast charging technology, supporting a maximum output power of 18W and delivering a slightly higher 4.35V output for quicker recharge times. It offers the distinct advantage of simultaneously charging two devices by employing a dual-slot design with dynamic power distribution, optimizing power allocation as needed.

The charger excels in thermal regulation with a high rating in heat management, and it minimizes energy loss substantially better than the D2. Its detachable cable management system adds portability, while features such as an eco mode enhance its energy efficiency. Though it trades a bit of compactness in height for slightly greater width, it remains travel-friendly and shows a medium level of material sustainability. Wireless charging capabilities set it apart further, offering 10W wireless power support; a feature absent in the D2 model.

Quick Take

The Nitecore D2 is a stellar choice for those prioritizing simple, consistent charging with a solid safety net and modest power output. Meanwhile, the UM2 impresses users seeking faster, dual-channel charging paired with improved heat dissipation and energy savings. Both share durable builds and user-friendly designs, but UM2's enhanced features push it toward modern demand.

Bottom Line

For buyers desiring reliable, budget-minded charging with straightforward operation, the Nitecore D2 remains a dependable option, especially for beginners wanting a stable, single-device charger. However, when speed, efficiency, and the ability to charge multiple batteries at once are priorities, the Nitecore UM2 stands out decidedly as the more advanced and versatile solution, delivering improved thermal management and faster charging cycles.

Verdict

  • Winner: Nitecore UM2 - Superior dual charging speed, enhanced thermal and energy management, plus versatile modern features justify it as the better overall choice.
  • Runner-up: Nitecore D2 - Reliable, straightforward, and consistent single-device charging at a reasonable price point appeals to those who value simplicity.

Prices to Consider: The Nitecore UM2 can be found for around $19.99 to $22.18 at NitecoreStore, offering strong value relative to its advanced features. Meanwhile, the D2 is available starting at $0 at NitecoreStore, reflecting its enduring presence as a budget-friendly classic.

Comparisons 7

Two enter. One leaves your cart.

Price comparisons

(✱) Prices may be changed at any time without further notice.

Related comparisons 7

Because one duel is never enough.

Comparisons & Facts 154

Side by side. The numbers. The features. No drama.

From feature sets to real-life wins and flaws, this chargers comparison between Nitecore D2 and Nitecore UM2 helps you cut through the noise.

General Information 15

User Level

What user level is this charger designed for?

8 Nitecore D2 0 Votes Beginner

15 Nitecore UM2 1 Votes Beginner

Nitecore D2
Nitecore D2

Designed for beginner users, this charger is likely straightforward to operate without complex features.

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

Both chargers are for beginners but the UM2 has the newer features and faster charging so it wins.

See more

Product Name

What is the product name?

58 Nitecore D2 0 Votes Nitecore D2

61 Nitecore UM2 0 Votes Nitecore UM2

Official product name used to identify the charger model.

Usage Environment

Where can this charger be used?

38 Nitecore D2 0 Votes Indoor

25 Nitecore UM2 0 Votes Indoor

Specifies the environments where the charger is designed to operate.

Intended Use

What is the intended use of this charger?

63 Nitecore D2 0 Votes Home, Office, Travel

65 Nitecore UM2 0 Votes Home

Nitecore D2
Nitecore D2

The charger is intended for use in home, office, and travel environments, offering versatility across these scenarios.

Nitecore UM2
Nitecore UM2

The charger is primarily intended for Home use, making it suitable for everyday personal charging scenarios in household environments.

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

Charger Type

What type of charger is this?

38 Nitecore D2 0 Votes Wall Charger

45 Nitecore UM2 0 Votes Wall Charger

Nitecore D2
Nitecore D2

The charger is a wall charger type, designed to plug directly into an electrical outlet rather than rely on external power sources.

Defines the primary charger category based on form and usage.

Charging Technology

What charging technology does it use?

18 Nitecore D2 0 Votes Standard Charging

55 Nitecore UM2 0 Votes Fast Charging

Nitecore D2
vs
Nitecore UM2
Charging Technology

Nitecore D2 uses Standard Charging technology, while Nitecore UM2 features Fast Charging technology. This means UM2 charges batteries more quickly, making it more convenient for users needing faster power replenishment.

Indicates the core technology used to deliver power efficiently.

Power Source

What is the power source?

53 Nitecore D2 0 Votes AC Outlet, DC Outlet

75 Nitecore UM2 0 Votes USB Power

Nitecore UM2
Nitecore UM2

This charger draws power from USB sources, making it compatible with standard USB power adapters and ports commonly found in electronics.

Defines where the charger draws its power from.

Release Year

What year was this charger released?

13 Nitecore D2 0 Votes 2014

30 Nitecore UM2 0 Votes 2018

Nitecore D2
vs
Nitecore UM2
Release Year

Nitecore D2 was released in 2014, whereas Nitecore UM2 came out more recently in 2018. UM2 benefits from newer technology advancements, making it more modern suitable for users seeking up-to-date features.

The year the charger model was first released to market.

Device Compatibility

What devices are compatible with this charger?

38 Nitecore D2 0 Votes Accessory

45 Nitecore UM2 0 Votes Accessory

Indicates the types of devices the charger can power.

Compatibility Notes

Are compatibility notes clearly provided?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Indicates whether additional compatibility limitations or requirements are clearly disclosed.

Installation Type

How is the charger installed?

28 Nitecore D2 0 Votes Plug-In

35 Nitecore UM2 0 Votes Desktop

Describes how the charger is installed or connected.

Mounting Style

What is the mounting style?

8 Nitecore D2 0 Votes Desktop

45 Nitecore UM2 0 Votes Desktop

Indicates how the charger is physically positioned during use.

Electrical & Power 19

Output Voltage

What is the output voltage?

4.2 Volt 0 Votes
Nitecore D2
4.35 Volt 0 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Output Voltage

Output Voltage for Nitecore D2 is 4.2V, while UM2 offers a slightly higher voltage at 4.35V, which may improve charging efficiency. UM2 is preferable for users aiming for optimal voltage performance.

The voltage supplied to connected devices during charging.

Input Current

How much input current does it draw?

0.25 A 0 Votes
Nitecore D2
2 A 1 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Input Current

Input Current is 0.25A for Nitecore D2 and significantly higher at 2A for Nitecore UM2, indicating UM2 can handle greater current input for faster charging speeds.

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

Input current is way higher on the UM2 so it charges quicker and that suits my needs better.

See more

Minimum Output Power

What is the minimum output power?

1 Watt 0 Votes
Nitecore D2
2.5 Watt 0 Votes
Nitecore UM2

Nitecore D2
Nitecore D2

Minimum output power is 1 Watt, representing the lowest power the charger can deliver to a connected device.

Nitecore UM2
Nitecore UM2

Minimum output power is 2.5 Watt, ensuring even low-power devices receive adequate charging current for trickle charging or battery maintenance.

The lowest stable power output supported by the charger.

Input Voltage

What input voltage does it support?

100 Volt 0 Votes
Nitecore D2
5 Volt 0 Votes
Nitecore UM2

Nitecore D2
Nitecore D2

The charger supports an input voltage of 100 Volt, compatible with many international power grids.

Nitecore UM2
Nitecore UM2

It operates on an input voltage of 5 Volt, which is standard for USB power sources and compatible with most USB charging ports.

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

Output Current

What is the output current?

0.5 A 0 Votes
Nitecore D2
1 A 0 Votes
Nitecore UM2

Nitecore D2
Nitecore D2

Output current is 0.5 Ampere, defining the current delivered to devices during charging.

Nitecore UM2
Nitecore UM2

The output current is rated at 1 A, which is standard for charging many small electronics steadily and safely.

The maximum current delivered to devices for charging.

Standby Power Consumption

How much power is used on standby?

0.3 Watt 0 Votes
Nitecore D2
0.1 Watt 0 Votes
Nitecore UM2

Nitecore D2
Nitecore D2

The standby power consumption is 0.3 Watt, indicating a low power draw when the device is not actively charging but remains plugged in.

Nitecore UM2
Nitecore UM2

Standby power consumption is extremely low at 0.1 Watt, which helps reduce unnecessary energy use when the charger is idle.

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

Peak Power Handling

What peak power can it handle?

10 Watt 0 Votes
Nitecore D2
18 Watt 0 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Peak Power Handling

Peak Power Handling is 10W on Nitecore D2 compared to 18W on Nitecore UM2. UM2 supports higher peak output power, enhancing performance during demanding charging conditions.

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

Maximum Output Power

What is the maximum output power?

10 Watt 0 Votes
Nitecore D2
18 Watt 1 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Maximum Output Power

Maximum Output Power is 10W for Nitecore D2 and higher at 18W for Nitecore UM2. UM2 provides 80% more power, making it better for faster and more efficient charging sessions.

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

The maximum output power is better on the UM2 so I prefer that one since it can charge faster.

See more

Input Frequency

What input frequency is supported?

50 Hz 0 Votes
Nitecore D2
50 Hz 0 Votes
Nitecore UM2

Nitecore D2
Nitecore D2

The device operates at an input frequency of 50 Hertz, standard for many countries' electrical grids.

The electrical frequency range the charger can accept.

Surge Protection Rating

How strong is the surge protection?

55 Nitecore D2 0 Votes Enhanced

70 Nitecore UM2 0 Votes Enhanced

Nitecore D2
Nitecore D2

Enhanced surge protection is included, offering better defense against voltage spikes compared to basic protection to safeguard connected devices.

Indicates the strength of protection against voltage spikes.

Power Efficiency

How efficient is the charger?

38 Nitecore D2 0 Votes Medium

95 Nitecore UM2 0 Votes High

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

Power Factor

What is the power factor?

8 Nitecore D2 0 Votes Low

45 Nitecore UM2 0 Votes Medium

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

Charging Performance 14

Simultaneous Device Charging

How many devices can be charged simultaneously?

Who knows? 0 Votes Nitecore D2 (Help us out by suggesting one!)

20 Nitecore UM2 0 Votes 2

Nitecore D2
vs
Nitecore UM2
Simultaneous Device Charging

Nitecore D2 does not support Simultaneous Device Charging, listed as n/a, whereas UM2 can charge 2 devices at once. UM2 is more versatile for charging multiple batteries.

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

Power Distribution Method

How is power distributed?

0 Nitecore D2 0 Votes Fixed

65 Nitecore UM2 0 Votes Dynamic

Nitecore D2
vs
Nitecore UM2
Power Distribution Method

Power Distribution Method in Nitecore D2 is Fixed, contrasting with UM2's Dynamic method. UM2’s dynamic distribution better adapts to varying battery charging needs, optimizing performance.

Describes how power is allocated across multiple ports.

Maximum Charging Speed

What is the maximum charging speed?

5 Watt 0 Votes
Nitecore D2
15 Watt 0 Votes
Nitecore UM2

Nitecore D2
Nitecore D2

Maximum charging speed is 5 Watt, which suits charging small devices at a moderate pace.

Nitecore UM2
Nitecore UM2

Maximum charging speed is 15 Watt, enabling rapid charging for supported devices while balancing heat and safety concerns.

The highest charging power delivered to a single device.

Charging Stability

How stable is the charging performance?

28 Nitecore D2 0 Votes Stable

45 Nitecore UM2 0 Votes Stable

Nitecore UM2
Nitecore UM2

Charging stability is stable, signifying reliable power delivery without significant fluctuations to protect device batteries.

Reflects how consistent charging output remains over time.

Charging Speed

What is the charging speed category?

8 Nitecore D2 0 Votes Standard

65 Nitecore UM2 0 Votes Fast

Classifies overall charging speed based on supported power and protocols.

Intelligent Power Allocation

Does it allocate power intelligently?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Automatically adjusts power delivery based on connected devices.

Heat Management Efficiency

How efficient is heat management?

38 Nitecore D2 0 Votes Medium

95 Nitecore UM2 0 Votes High

Nitecore D2
vs
Nitecore UM2
Heat Management Efficiency

Heat Management Efficiency is Medium for Nitecore D2, while Nitecore UM2 offers High efficiency, making UM2 better at maintaining safe temperatures during intensive use.

Measures how effectively heat is managed during charging.

Throttling Behavior

How does the charger throttle performance?

88 Nitecore D2 0 Votes Gradual

95 Nitecore UM2 0 Votes Gradual

Describes how charging speed is reduced when limits are reached.

Full Charge Time Estimate

How long does a full charge take?

18 Nitecore D2 0 Votes 3–6 hours

Who knows? 0 Votes Nitecore UM2 (Help us out by suggesting one!)

Estimated time required to fully charge a typical device.

Charging Consistency

Is charging speed consistent?

88 Nitecore D2 0 Votes Consistent

95 Nitecore UM2 0 Votes Consistent

Indicates how evenly charging speed is maintained throughout a session.

Idle Charging Behavior

What happens after charging is complete?

68 Nitecore D2 0 Votes Trickle

55 Nitecore UM2 0 Votes Standby

Nitecore D2
vs
Nitecore UM2
Idle Charging Behavior

The Idle Charging Behavior differs: Nitecore D2 uses Trickle charging while UM2 employs Standby mode. UM2's standby mode could be more energy efficient when devices are fully charged.

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

Adaptive Charging

Does it support adaptive charging?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Adjusts charging patterns based on device needs and conditions.

Ports & Connectivity 17

Wireless Charging Power

What is the wireless charging power?

Who knows? 0 Votes Nitecore D2 (Help us out by suggesting one!)

10 Watt 0 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Wireless Charging Power

Wireless Charging Power is unavailable (n/a) for Nitecore D2, but UM2 supports 10W wireless charging, enhancing convenience for compatible devices.

Maximum power delivered during wireless charging.

USB-C Ports

How many USB-C ports does it have?

5 Nitecore D2 0 Votes 0

4 Nitecore UM2 0 Votes 0

Nitecore D2
vs
Nitecore UM2
USB-C Ports

Neither Nitecore D2 nor UM2 have USB-C Ports, both listing 0. So there is no difference in USB-C connectivity.

Number of USB-C output ports for modern devices.

Interchangeable Plugs

Does it support interchangeable plugs?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Interchangeable Plugs

Interchangeable Plugs are not available in either Nitecore D2 or UM2, limiting plug customization options equally.

Supports interchangeable plug heads for different regions.

USB-A Ports

How many USB-A ports are included?

0 Nitecore D2 0 Votes 0

4 Nitecore UM2 0 Votes 0

Nitecore D2
vs
Nitecore UM2
USB-A Ports

Both Nitecore D2 and UM2 have 0 USB-A Ports, showing equal connectivity options with no USB-A support.

Number of traditional USB-A output ports.

Cable Length

How long is the charging cable?

3 ft 0 Votes
Nitecore D2
3.3 ft 1 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Cable Length

Cable Length is 3 ft for Nitecore D2 and slightly longer at 3.3 ft for UM2. The extra length gives UM2 a minor advantage in flexibility during charging setups.

Length of the included charging cable.

The UM2 has a slightly longer cable which is handy so I personally prefer that one.

See more

Connector Type

What connector types are supported?

48 Nitecore D2 0 Votes USB-A

65 Nitecore UM2 0 Votes USB-A

Nitecore D2
Nitecore D2

The connector type is USB-A, a widely used standard for charging and data interfaces.

Nitecore UM2
Nitecore UM2

The connector type is USB-A, the traditional and widely compatible USB interface for many devices and cables.

Types of connectors supported by the charger.

Total Ports

How many total ports does the charger have?

17 Nitecore D2 0 Votes 2

15 Nitecore UM2 0 Votes 2

Nitecore D2
Nitecore D2

The charger accommodates a total of 2 ports, allowing simultaneous charging of two devices.

Nitecore UM2
Nitecore UM2

This charger has a total of 2 ports, allowing for charging multiple devices simultaneously.

Total number of output ports available for charging devices.

Wireless Charging

Does it support wireless charging?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Indicates whether the charger supports wireless charging.

Detachable Cable

Is the cable detachable?

No 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Indicates whether the charging cable can be detached.

Pass-Through Charging

Does it support pass-through charging?

Yes 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Allows the charger to power devices while itself being powered.

Port Placement

Where are the ports located?

58 Nitecore D2 0 Votes Top

65 Nitecore UM2 0 Votes Side

Location of charging ports on the charger body.

Port Labeling

Are the ports labeled?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Indicates whether ports are clearly labeled for identification.

Physical Dimensions & Weight 7

Weight

How much does the charger weigh?

0.42 lbs 1 Votes
Nitecore D2
0.33 lbs 0 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Weight

The weight of Nitecore D2 is 0.42 lbs, whereas UM2 is lighter at 0.33 lbs. UM2 is more travel-friendly due to its lighter weight.

Total weight of the charger including built-in components.

The D2 is a bit heavier but that weight makes it feel more solid to me so I prefer it.

See more

Width

What is the width of the charger?

4.1 inch 0 Votes
Nitecore D2
5.98 inch 0 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Width

Width is 4.1 inches for Nitecore D2 versus 5.98 inches for UM2, meaning D2 is narrower and may be easier to fit in tight spaces.

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

Height

What is the height of the charger?

2.4 inch 0 Votes
Nitecore D2
1.57 inch 0 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Height

Height measures 2.4 inches for Nitecore D2 and 1.57 inches for UM2, indicating UM2 is more compact vertically, benefiting portability.

The vertical measurement of the charger from bottom to top.

Cable Thickness

How thick is the cable?

0.12 inch 0 Votes
Nitecore D2
0.12 inch 0 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Cable Thickness

Cable Thickness is identical at 0.12 inches for both models, so neither has a thinner or thicker cable than the other.

Thickness of the charging cable, affecting durability and flexibility.

Depth

What is the depth of the charger?

1.3 inch 0 Votes
Nitecore D2
2.87 inch 0 Votes
Nitecore UM2

Nitecore UM2
Nitecore UM2

Depth measures 2.87 inch (7.29 cm), contributing to the overall compact size that facilitates portability and space-saving usage.

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

Plug Profile Depth

How far does the plug stick out?

Who knows? 0 Votes Nitecore D2 (Help us out by suggesting one!)

0.6 inch 0 Votes
Nitecore UM2

Depth of the plug profile when inserted into an outlet.

Travel Size Classification

Is this charger travel-sized?

58 Nitecore D2 0 Votes Compact

65 Nitecore UM2 0 Votes Compact

Nitecore D2
vs
Nitecore UM2
Travel Size Classification

Both Nitecore D2 and UM2 are classified as Compact in Travel Size Classification, making them equally portable and easy to carry.

Overall size category based on dimensions and portability.

Build Quality & Materials 11

Heat-Resistant Materials

Does it use heat-resistant materials?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Heat-Resistant Materials

Both chargers use Heat-Resistant Materials ensuring durability and safety during operation, equally beneficial for long-term use.

Uses materials designed to withstand high temperatures safely.

Scratch Resistance

How scratch-resistant is it?

38 Nitecore D2 0 Votes Medium

35 Nitecore UM2 0 Votes Medium

Nitecore D2
vs
Nitecore UM2
Scratch Resistance

Scratch Resistance is Medium on both Nitecore D2 and UM2, providing moderate protection against surface wear equally.

Resistance of the surface to scratches and abrasions.

Material Sustainability Level

How sustainable are the materials?

0 Nitecore D2 0 Votes Low

45 Nitecore UM2 0 Votes Medium

Nitecore D2
vs
Nitecore UM2
Material Sustainability Level

Material Sustainability Level is Low in Nitecore D2, while UM2 improves to Medium. UM2 is more eco-conscious in material choices.

Use of sustainable or environmentally friendly materials.

Fire-Retardant Rating

What is the fire-retardant rating?

88 Nitecore D2 0 Votes V-0

95 Nitecore UM2 0 Votes V-0

Nitecore D2
Nitecore D2

The device has a fire-retardant rating of V-0, the highest standard for flame retardancy, ensuring the materials used resist ignition and flame spread effectively.

Nitecore UM2
Nitecore UM2

Fire-retardant rating V-0 is the highest standard, indicating excellent flame retardancy and enhanced fire safety for the charger materials.

Fire safety rating of the charger materials.

Housing Material

What is the housing material?

38 Nitecore D2 0 Votes Plastic

35 Nitecore UM2 0 Votes Plastic

Nitecore D2
vs
Nitecore UM2
Housing Material

Housing Material for both Nitecore D2 and UM2 is Plastic, offering similar build quality and finish in this regard.

Primary material used for the outer charger casing.

Drop Resistance

How drop-resistant is the charger?

3 ft 0 Votes
Nitecore D2
3 ft 0 Votes
Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Drop Resistance

Drop Resistance for both devices is rated at 3 ft, offering comparable protection against accidental falls from similar heights.

Maximum drop height the charger can withstand without damage.

Plug Material

What material is the plug made of?

48 Nitecore D2 0 Votes Metal

85 Nitecore UM2 0 Votes Metal

Material used for the plug prongs and structure.

Port Reinforcement

Are the ports reinforced?

88 Nitecore D2 0 Votes Reinforced

0 Nitecore UM2 0 Votes Standard

Indicates whether charging ports are reinforced for durability.

Surface Finish

What is the surface finish?

58 Nitecore D2 0 Votes Matte

35 Nitecore UM2 0 Votes Matte

External surface finish affecting grip and aesthetics.

Build Rigidity

How rigid is the charger build?

88 Nitecore D2 0 Votes Solid

85 Nitecore UM2 0 Votes Solid

Overall structural stiffness of the charger body.

Moisture Resistance

Is it resistant to moisture?

0 Nitecore D2 0 Votes None

0 Nitecore UM2 0 Votes None

Ability to withstand moisture exposure.

Safety & Protection Features 15

Thermal Fail-Safe Mode

Is there a thermal fail-safe mode?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Thermal Fail-Safe Mode

Thermal Fail-Safe Mode is present on both devices, providing equal thermal protection to prevent overheating issues during charging.

Emergency mode that safely disables charging during extreme heat.

Safety Redundancy Level

What is the safety redundancy level?

88 Nitecore D2 0 Votes Multi-Layer

95 Nitecore UM2 0 Votes Multi-Layer

Nitecore D2
vs
Nitecore UM2
Safety Redundancy Level

Both Nitecore D2 and UM2 feature Multi-Layer Safety Redundancy, enhancing user safety comparably through multiple protection mechanisms.

Indicates the number of safety systems working together.

Overheat Protection

Does it have overheat protection?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

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

Temperature Monitoring

Is temperature actively monitored?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Continuously monitors internal temperature during operation.

Fire Protection

Does it include fire protection?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Nitecore D2
vs
Nitecore UM2
Fire Protection

Fire Protection is included in both Nitecore D2 and UM2, ensuring safety against fire hazards equally in both products.

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

Electrical Isolation

Is electrical isolation implemented?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

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

Grounding

Does it support grounding?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Supports grounding to reduce shock and electrical interference.

Child Safety Shutter

Is there a child safety shutter?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Prevents accidental insertion of objects into live ports.

Anti-Spark Protection

Does it have anti-spark protection?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Reduces sparking when plugging or unplugging devices.

EMI Protection

Is EMI protection included?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Protects against electromagnetic interference affecting nearby electronics.

ESD Protection

Is ESD protection supported?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Shields the charger from electrostatic discharge damage.

Auto Shut-Off

Does it shut off automatically?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Automatically cuts power when unsafe conditions are detected.

Compatibility & Standards 12

Laptop Charging

Can it charge laptops?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Indicates whether the charger can power laptops.

Tablet Charging

Does it support tablet charging?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Indicates compatibility with tablets and similar devices.

Backward Compatibility

Is it backward compatible?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Maintains compatibility with older charging standards and devices.

USB Power Delivery

Does it support USB Power Delivery?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

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

Quick Charge

Does it support Quick Charge?

No 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Indicates compatibility with Qualcomm Quick Charge technology.

PPS

Does it support PPS?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Supports Programmable Power Supply for efficient fast charging.

Wireless Charging Standard

Which wireless charging standard is supported?

Who knows? 0 Votes Nitecore D2 (Help us out by suggesting one!)

Who knows? 0 Votes Nitecore UM2 (Help us out by suggesting one!)

Specifies the wireless charging standard supported.

Apple Charging

Is it compatible with Apple devices?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Optimized compatibility with Apple devices and charging requirements.

Android Charging

Is it compatible with Android devices?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Ensures compatibility with Android devices and charging protocols.

Wearable Charging

Can it charge wearables?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Supports charging of wearables like smartwatches or earbuds.

Proprietary Protocol

Does it support proprietary protocols?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Supports manufacturer-specific charging protocols.

Cross-Brand Compatibility

How broad is cross-brand compatibility?

88 Nitecore D2 0 Votes Universal

95 Nitecore UM2 0 Votes Universal

Level of compatibility across different device brands.

Thermal & Environmental Performance 11

Energy Loss as Heat

How much energy is lost as heat?

38 Nitecore D2 0 Votes Moderate

85 Nitecore UM2 1 Votes Low

Nitecore D2
Nitecore D2

Energy loss as heat is moderate, which means the charger converts a fair amount of input power to heat during operation, reflecting a balance between efficiency and thermal output.

Percentage of input energy lost as heat during charging.

Energy loss as heat is lower on the UM2 so it's cooler and more efficient which I like.

See more

Noise Level

How noisy is the charger?

Who knows? 0 Votes Nitecore D2 (Help us out by suggesting one!)

0 dB 0 Votes
Nitecore UM2

Operational noise produced during charging.

Operating Temperature Range

What is the operating temperature range?

68 Nitecore D2 0 Votes 32–104°F

45 Nitecore UM2 0 Votes 32–104°F

Nitecore UM2
Nitecore UM2

The operating temperature range is 32–104°F (0–40°C), which covers typical indoor temperatures ensuring reliable performance without overheating.

The temperature range within which the charger operates safely.

Storage Temperature Range

What is the storage temperature range?

63 Nitecore D2 0 Votes -4–158°F

55 Nitecore UM2 0 Votes 14–140°F

Nitecore UM2
Nitecore UM2

Storage temperature range is 14–140°F (-10 to 60°C), accommodating a wide range of environmental conditions during transport or storage.

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

Thermal Dissipation Method

How does it dissipate heat?

18 Nitecore D2 0 Votes Passive

25 Nitecore UM2 0 Votes Passive

Nitecore D2
Nitecore D2

Thermal dissipation method is passive, relying on materials and design rather than fans to cool down during operation.

Method used to release heat during operation.

Internal Cooling Design

What internal cooling design is used?

28 Nitecore D2 0 Votes Heat Sink

75 Nitecore UM2 0 Votes Heat Sink

Nitecore D2
Nitecore D2

The internal cooling design uses a heat sink, a passive method to dissipate heat effectively without active fans.

Internal structure designed to manage heat.

Thermal Throttling Threshold

At what temperature does throttling occur?

140 °F 0 Votes
Nitecore D2
140 °F 0 Votes
Nitecore UM2

Nitecore UM2
Nitecore UM2

Thermal throttling threshold is 140°F (60°C). Once this temperature is reached, the charger will reduce output to prevent overheating, protecting both the device and charger components.

Temperature at which charging power is reduced to prevent overheating.

Fanless Design

Is the charger fanless?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Indicates whether cooling is achieved without a fan.

Ambient Temperature Tolerance

How tolerant is it to ambient temperatures?

38 Nitecore D2 0 Votes Medium

45 Nitecore UM2 0 Votes Medium

Ability to perform in varying ambient temperatures.

Altitude Operating Range

What altitude can it operate at?

Who knows? 0 Votes Nitecore D2 (Help us out by suggesting one!)

Who knows? 0 Votes Nitecore UM2 (Help us out by suggesting one!)

Maximum altitude at which the charger operates reliably.

Sustained Load Temperature Stability

How stable is temperature under sustained load?

88 Nitecore D2 0 Votes Stable

95 Nitecore UM2 0 Votes Stable

Temperature stability during prolonged high-load charging.

Usability & Convenience 12

Cable Management

How is the cable managed?

63 Nitecore D2 1 Votes Built-In

65 Nitecore UM2 0 Votes Detachable

Nitecore D2
Nitecore D2

Cable management is built-in, helping to keep cables organized and reduce clutter around charging areas.

How the charging cable is managed when not in use.

Cable management is built in on the D2, which is super convenient so I definitely prefer that.

See more

Plug Orientation

What is the plug orientation?

8 Nitecore D2 0 Votes Straight

25 Nitecore UM2 0 Votes Straight

Orientation of the plug relative to the charger body.

LED Indicators

Does it have LED indicators?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Presence of LED lights to show charging or power status.

Travel Friendly

Is it travel-friendly?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Designed for easy transport and use while traveling.

Daily Use Convenience

How convenient is it for daily use?

88 Nitecore D2 0 Votes High

95 Nitecore UM2 0 Votes High

Overall convenience during everyday use.

Indicator Behavior

How do the indicators behave?

58 Nitecore D2 0 Votes Color-Coded

65 Nitecore UM2 0 Votes Color-Coded

Nitecore D2
Nitecore D2

Indicator behavior is color-coded, providing intuitive visual signals for charging status and errors.

How indicator lights behave during operation.

User Feedback Method

How does it provide user feedback?

63 Nitecore D2 0 Votes LED

65 Nitecore UM2 0 Votes LED

Nitecore D2
Nitecore D2

User feedback is provided through LED indicators, allowing users to easily see the charging status and any alerts visually.

Methods used to communicate status to the user.

Setup Complexity

How complex is setup?

78 Nitecore D2 0 Votes Plug-and-Play

45 Nitecore UM2 0 Votes Plug-and-Play

Nitecore UM2
Nitecore UM2

The charger offers plug-and-play setup, requiring no complicated installation or configuration before use.

Effort required to start using the charger.

Foldable Plug

Does it have a foldable plug?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

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

One-Hand Operation

Can it be operated with one hand?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Allows easy plugging and unplugging with one hand.

Maintenance Requirements

Does it require maintenance?

38 Nitecore D2 0 Votes Low

95 Nitecore UM2 0 Votes None

Level of maintenance needed to keep the charger functioning well.

Firmware Upgradable

Can the firmware be updated?

Yes 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Indicates whether the charger firmware can be updated.

Durability & Reliability 9

Manufacturing Quality Level

What is the manufacturing quality level?

88 Nitecore D2 0 Votes Premium

95 Nitecore UM2 0 Votes Premium

Nitecore D2
Nitecore D2

Manufacturing quality level is premium, reflecting high-quality materials and assembly standards for better durability and performance.

Overall manufacturing quality classification.

Rated Lifespan

How long is the rated lifespan?

88 Nitecore D2 0 Votes Long

95 Nitecore UM2 0 Votes Long

Expected operational lifespan of the charger under normal usage conditions.

Mean Time Between Failures

How reliable is the charger over time?

88 Nitecore D2 0 Votes High

95 Nitecore UM2 0 Votes High

Average reliability level indicating how often failures are expected.

Plug Insertion Cycles

How durable is the plug connection over time?

88 Nitecore D2 0 Votes High

95 Nitecore UM2 0 Votes High

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

Port Wear Resistance

How resistant are the ports to wear?

88 Nitecore D2 0 Votes High

95 Nitecore UM2 0 Votes High

Resistance of charging ports to wear over time.

Cable Flex Cycles

How durable is the charging cable under repeated bending?

Who knows? 0 Votes Nitecore D2 (Help us out by suggesting one!)

45 Nitecore UM2 0 Votes Medium

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

Long-Term Stability

How stable is long-term performance?

88 Nitecore D2 0 Votes Stable

95 Nitecore UM2 0 Votes Stable

Performance consistency over extended use periods.

Environmental Stress Resistance

How resistant is it to environmental stress?

38 Nitecore D2 0 Votes Medium

45 Nitecore UM2 0 Votes Medium

Ability to withstand heat, humidity, and other stresses.

Reliability Certification

Is reliability certified?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Indicates whether reliability has been independently certified.

Energy & Efficiency Compliance 8

Energy Efficiency Rating

What is the energy efficiency rating?

38 Nitecore D2 0 Votes Medium

95 Nitecore UM2 0 Votes High

Overall classification of how efficiently the charger converts power.

Carbon Footprint Category

What is the carbon footprint category?

28 Nitecore D2 0 Votes Medium

45 Nitecore UM2 0 Votes Medium

Estimated environmental impact from production and use.

Energy Saving Features

Does it have energy-saving features?

Yes 0 Votes Nitecore D2

Yes 0 Votes Nitecore UM2

Built-in features designed to reduce energy consumption.

Eco Mode

Does it support eco mode?

No 0 Votes Nitecore D2

Yes 1 Votes Nitecore UM2

Reduces power consumption when full charging is not required.

The UM2 has an eco mode which is awesome for saving energy so I go with UM2 here.

See more

Energy Star Compliance

Is it Energy Star compliant?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Indicates compliance with Energy Star efficiency standards.

Standby Efficiency

How efficient is the charger in standby mode?

38 Nitecore D2 0 Votes Medium

95 Nitecore UM2 0 Votes High

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

Power Loss Rating

How much power is lost during operation?

38 Nitecore D2 0 Votes Medium

95 Nitecore UM2 0 Votes Low

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

Green Materials Usage

Are green materials used?

No 0 Votes Nitecore D2

No 0 Votes Nitecore UM2

Uses environmentally friendly or recycled materials.

Warranty & Support 4

Warranty Length

How long is the warranty?

28 Nitecore D2 0 Votes 1 Year

25 Nitecore UM2 0 Votes 1 Year

Duration of warranty coverage provided with the charger.

Support Channels

What support channels are available?

43 Nitecore D2 0 Votes Email, Online Portal

45 Nitecore UM2 0 Votes Email, Online Portal

Ways users can contact customer support.

Customer Support Availability

When is customer support available?

18 Nitecore D2 0 Votes Business Hours

45 Nitecore UM2 0 Votes Business Hours

Nitecore UM2
Nitecore UM2

Customer support is available during business hours, providing users with a dedicated time frame to contact support for assistance.

Availability of customer support services.

Replacement Policy

What is the replacement policy?

18 Nitecore D2 0 Votes Standard Returns

55 Nitecore UM2 0 Votes Standard Returns

Nitecore D2
Nitecore D2

The replacement policy follows standard returns, offering reasonable time and conditions for product return or exchange.

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

Surveys

Because hot takes deserve votes.

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
Nitecore D2
0 Votes
Nitecore UM2
Very fast charging — 1 to 2 hours
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Decent charging speed — 2 to 4 hours
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Slow charging — 4 to 6 hours
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Very slow charging — Over 6 hours
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

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
Nitecore D2
0 Votes
Nitecore UM2
Strong and reliable output — 45 to 64 watts
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Good for most daily devices — 25 to 44 watts
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Limited power capability — 10 to 24 watts
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Very weak power delivery — Under 10 watts
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

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
Nitecore D2
0 Votes
Nitecore UM2
Very solid and dependable — 3 to 5 years
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Decently built for regular use — 2 to 3 years
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Feels somewhat fragile — 1 to 2 years
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Breaks down too quickly — Under 1 year
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

Portability and Size

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

Ultra compact and pocketable — Under 3 ounces
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Light and travel friendly — 3 to 5 ounces
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Moderately easy to carry — 5 to 7 ounces
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Somewhat bulky — 7 to 10 ounces
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Heavy and inconvenient — Over 10 ounces
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

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
Nitecore D2
0 Votes
Nitecore UM2
Gets slightly warm — 90 to 100 degrees Fahrenheit
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Noticeably warm to the touch — 100 to 110 degrees Fahrenheit
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Runs quite hot — 110 to 120 degrees Fahrenheit
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Uncomfortably hot — Over 120 degrees Fahrenheit
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

Ease of Use

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

Effortless and intuitive — No learning needed
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Very easy to understand — Minimal effort
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Takes a little getting used to — Some adjustment
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Slightly confusing at times — Requires patience
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Frustrating to use — Feels complicated
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

Setup Experience

How smooth is the initial setup experience with this chargers?

Instantly ready to use — Plug and charge
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Quick and simple setup — Less than 1 minute
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Setup takes some attention — A few minutes
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Setup feels awkward — Several minutes
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Setup feels annoying — Too many steps
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

Design and Visual Appeal

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

Sleek and modern look — Feels premium
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Clean and stylish design — Looks nice
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Simple and acceptable — Nothing special
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Somewhat unattractive — Feels dated
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Cheap-looking design — Not appealing
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

Noise and Comfort

How comfortable is this chargers to use in quiet environments?

Completely silent operation — No noise at all
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Almost silent — Barely noticeable
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Occasionally noticeable — Slight sound
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Clearly noticeable noise — Can be distracting
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Annoyingly loud — Very disruptive
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

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
Nitecore D2
0 Votes
Nitecore UM2
Pretty good price — Feels reasonable
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Fair deal overall — Acceptable cost
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Kinda pricey — Feels expensive
0 Votes
Nitecore D2
0 Votes
Nitecore UM2
Crazy expensive — Not worth it
0 Votes
Nitecore D2
0 Votes
Nitecore UM2

Guides 2

Files 1

Nitecore D2 Owner’s Guide

nitecore.com
nitecore.com

Files 1

Your Nitecore UM2 Assistance Guide

nitecore.com
nitecore.com

Reviews 0

The good, the bad, and the brutally honest.

Average Rating

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Nitecore UM2
0 / 5 0 Reviews

Discussions 0

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Awards 0

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