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Onn 4,000 mAh Facts: 134 Specifications & 22 Highlights

Get the facts before you unbox. The Onn 4,000 mAh power bank features 134 key specs & features, with general information, battery & capacity, charging input performance & power output performance topping the list.

14 Points
Onn 4,000 mAh

Highlights 22

No extras. Just what matters.
14 Points

Why is Onn 4,000 mAh better than other power banks ?

General Information

Scroll down for more facts

Battery & Capacity

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Charging Input Performance

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Power Output Performance

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Physical Dimensions & Weight

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Display, Indicators & Controls

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Environmental & Efficiency

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Quick Take

The essentials that matter—nothing extra

A fast snapshot of the Onn 4,000 mAh, covering its standout specification and what you can expect right out of the box.

Onn 4,000 mAh
Onn 4,000 mAh

Onn 4,000 mAh is a budget-friendly portable charger, often sold at Walmart, available in a standard USB version (with a Micro-USB or USB-C port) for universal device charging and a newer MFi-certified MagSafe version specifically for iPhones, which provides about one additional charge for smartphones. This power bank features an LED indicator, safety protection, and comes with a basic charging cable, designed for everyday use to keep phones and other USB devices powered.

Specifications & Facts 134

Specs measured. Drama avoided.

From specs to pricing quirks, we reviewed the Onn 4,000 mAh power bank and measured it up to other power banks. Want the crowd verdict? It’s here.

General Information 10

Onn 4,000 mAh Color Options

What color options are available?

77 Onn 4,000 mAh 0 Votes Black,White

24 Power Banks in this range Black

Onn 4,000 mAh
Onn 4,000 mAh

Available in both Black and White color options to suit personal preference.

Lists the available exterior color choices.

Onn 4,000 mAh Product Type

What is the product type?

57 Onn 4,000 mAh 0 Votes Power Bank

21 Power Banks in this range Power Bank

Identifies the functional category of the portable charging device.

Onn 4,000 mAh Country of Origin

Where is this product made?

67 Onn 4,000 mAh 0 Votes China

23 Power Banks in this range China

States the country where the product is manufactured or assembled.

Onn 4,000 mAh Finish Type

What type of finish does it have?

57 Onn 4,000 mAh 0 Votes Matte

20 Power Banks in this range Matte

Describes the surface finish of the exterior shell.

Onn 4,000 mAh Intended Use Case

What is the intended use case?

62 Onn 4,000 mAh 0 Votes Smartphone Charging, Travel Backup, Emergency Power

20 Power Banks in this range Smartphone Charging, Tablet Charging, Travel Backup, Emergency Power

Describes the primary usage scenarios the power bank is designed for.

Onn 4,000 mAh Release Year

What is the release year?

77 Onn 4,000 mAh 0 Votes 2022

29 Power Banks in this range 2024

Indicates the year the product was first released to market.

Battery & Capacity 14

Onn 4,000 mAh Battery Capacity

What is the battery capacity?

4,000 mAh 0 Votes
Onn 4,000 mAh
10,399.87 mAh (Average)

Onn 4,000 mAh
Onn 4,000 mAh

The battery capacity of 4000 mAh defines the total electrical charge the power bank can store.

States the total energy storage capacity of the battery cells.

Onn 4,000 mAh Rated Capacity

What is the rated capacity?

2,300 mAh 0 Votes
Onn 4,000 mAh
9,059.79 mAh (Average)

Onn 4,000 mAh
Onn 4,000 mAh

Rated capacity is 2300 mAh, meaning usable battery charge under typical conditions.

Indicates the usable output capacity after conversion losses.

Onn 4,000 mAh Battery Voltage

What is the battery voltage?

3.7 Volt 0 Votes
Onn 4,000 mAh
3.96 Volt (Average)

Onn 4,000 mAh
Onn 4,000 mAh

Battery voltage of 3.7 Volt is typical for lithium-ion cells used in portable devices.

Indicates the nominal voltage of the battery pack.

Onn 4,000 mAh Battery Configuration

What is the battery configuration?

17 Onn 4,000 mAh 0 Votes Single Cell

14 Power Banks in this range Single Cell

Onn 4,000 mAh
Onn 4,000 mAh

The battery configuration uses a single cell, typical for smaller capacities and simpler design.

Describes how battery cells are electrically arranged to achieve desired voltage and capacity.

Onn 4,000 mAh Cycle Life Rating

What is the cycle life rating?

47 Onn 4,000 mAh 0 Votes 300–500 Cycles

18 Power Banks in this range 300–500 Cycles

Onn 4,000 mAh
Onn 4,000 mAh

Battery's rated cycle life between 300 and 500 cycles suggests moderate longevity before capacity drops notably.

Indicates the estimated number of full charge cycles the battery can complete before noticeable capacity degradation.

Onn 4,000 mAh Self-Discharge Rate

What is the self-discharge rate?

5 % 0 Votes
Onn 4,000 mAh
9.95 % (Average)

Onn 4,000 mAh
Onn 4,000 mAh

Self-discharge rate of 5% reflects the percentage of charge lost naturally over time when the device is not in use.

Indicates how much charge is lost when not in use.

Charging Input Performance 10

Onn 4,000 mAh Fast Input Charging

Does it support fast input charging?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Onn 4,000 mAh
Onn 4,000 mAh

Does not support fast input charging, so it may take longer to recharge the power bank itself.

Indicates whether fast-charging input standards are supported.

Onn 4,000 mAh Charging Efficiency

What is the charging efficiency?

80 % 0 Votes
Onn 4,000 mAh
85.32 % (Average)

Onn 4,000 mAh
Onn 4,000 mAh

Charging efficiency rated at 80% means the power bank effectively converts input energy into stored battery power.

Measures how efficiently input power is converted to stored energy.

Onn 4,000 mAh Charging Time

How long does it take to fully recharge?

4 hour 0 Votes
Onn 4,000 mAh
3.69 hour (Average)

Onn 4,000 mAh
Onn 4,000 mAh

Charging time of 4 hours indicates the duration needed to fully charge the power bank from empty.

Estimates total time required to fully recharge the power bank.

Onn 4,000 mAh Input Port Type

What input port types are supported?

37 Onn 4,000 mAh 0 Votes Micro-USB

27 Power Banks in this range USB-C

Identifies the physical port types used to recharge the power bank.

Onn 4,000 mAh Input Port Count

How many input ports does it have?

17 Onn 4,000 mAh 0 Votes 2

4 Power Banks in this range 1

Indicates how many input ports are available for charging.

Onn 4,000 mAh Maximum Input Power

What is the maximum input power?

5 Watt 0 Votes
Onn 4,000 mAh
18.39 Watt (Average)

Shows the maximum power the power bank can accept while charging.

Power Output Performance 13

Onn 4,000 mAh Total Output Power

What is the total output power?

5 Watt 0 Votes
Onn 4,000 mAh
20.15 Watt (Average)

Onn 4,000 mAh
Onn 4,000 mAh

Total output power of 5 Watt is sufficient for charging most smartphones and small devices.

Measures the combined power available when using multiple ports.

Onn 4,000 mAh Output Voltage Range

What output voltage range is supported?

0 Onn 4,000 mAh 0 Votes 5V

0 Power Banks in this range 5V

Onn 4,000 mAh
Onn 4,000 mAh

The output voltage range fixed at 5V meets standard device charging requirements.

Defines the voltage levels supported for device charging.

Onn 4,000 mAh Output Current Rating

What is the output current rating?

5 Watt 0 Votes
Onn 4,000 mAh
10.76 Watt (Average)

Onn 4,000 mAh
Onn 4,000 mAh

The output current rating of 5 Watt shows the power bank can deliver this amount of power to charge devices efficiently.

Represents the power delivery capability under load conditions.

Onn 4,000 mAh Output Port Type

What output port types are available?

57 Onn 4,000 mAh 0 Votes USB-A

25 Power Banks in this range USB-A, USB-C

Identifies the physical ports used to deliver power to devices.

Onn 4,000 mAh Output Port Count

How many output ports does it have?

0 Onn 4,000 mAh 0 Votes 1

0 Power Banks in this range 2

Indicates how many devices can be physically connected at once.

Onn 4,000 mAh Maximum Output Power

What is the maximum output power?

5 Watt 0 Votes
Onn 4,000 mAh
19.8 Watt (Average)

Shows the highest power level supported by a single output.

Charging Protocols & Compatibility 12

Onn 4,000 mAh Apple Charging Compatibility

Is it compatible with Apple devices?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Ensures optimized charging for Apple devices.

Onn 4,000 mAh Samsung Charging Compatibility

Is it compatible with Samsung devices?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Confirms optimized charging for Samsung devices.

Onn 4,000 mAh Backward Compatibility

Is it backward compatible?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Ensures support for older devices and standards.

Onn 4,000 mAh USB Power Delivery

Does it support USB Power Delivery?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates support for the USB Power Delivery fast charging standard.

Onn 4,000 mAh Quick Charge

Is Quick Charge supported?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Confirms compatibility with Qualcomm Quick Charge standards.

Onn 4,000 mAh Programmable Power Supply

Does it support PPS charging?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates support for Programmable Power Supply charging.

Physical Dimensions & Weight 6

Onn 4,000 mAh Travel-Friendly Size

Is it travel-friendly?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates suitability for travel and carry-on use.

Onn 4,000 mAh Width

What is the width?

2.5 inch 0 Votes
Onn 4,000 mAh
3.79 inch (Average)

Measures the horizontal size of the power bank.

Onn 4,000 mAh Depth

What is the depth?

0.6 inch 0 Votes
Onn 4,000 mAh
2.01 inch (Average)

Measures the front-to-back thickness of the power bank.

Onn 4,000 mAh Height

What is the height?

4 inch 0 Votes
Onn 4,000 mAh
3.15 inch (Average)

Measures the vertical dimension of the power bank.

Onn 4,000 mAh Weight

How much does it weigh?

0.25 lbs 0 Votes
Onn 4,000 mAh
0.61 lbs (Average)

Indicates how heavy the power bank is for portability.

Onn 4,000 mAh Pocket-Friendly Design

Is it pocket-friendly?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether the size is suitable for pocket carry.

Build Materials & Durability 9

Onn 4,000 mAh Outer Shell Material

What is the outer shell material?

0 Onn 4,000 mAh 0 Votes Plastic

0 Power Banks in this range Plastic

Specifies the primary material used for the exterior housing.

Onn 4,000 mAh Internal Frame Material

What is the internal frame material?

0 Onn 4,000 mAh 0 Votes Plastic

0 Power Banks in this range Plastic

Describes the internal structural material supporting the battery cells.

Onn 4,000 mAh Impact Resistance Rating

What is the impact resistance rating?

0 Onn 4,000 mAh 0 Votes Low Impact Resistance

0 Power Banks in this range Moderate Impact Resistance

Indicates the ability of the power bank to withstand shocks and physical impacts.

Onn 4,000 mAh Heat Resistance

Is the power bank heat resistant?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether the power bank is designed to withstand elevated internal and external temperatures without performance degradation.

Onn 4,000 mAh Fire Retardant Materials

Does it use fire-retardant materials?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates use of flame-resistant materials in construction.

Onn 4,000 mAh Scratch Resistance

Is the surface scratch resistant?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether the exterior surface is resistant to scratches from daily handling and transport.

Display, Indicators & Controls 10

Onn 4,000 mAh Display Type

What type of display does it have?

0 Onn 4,000 mAh 0 Votes LED Indicator

0 Power Banks in this range LED Indicator

Specifies the type of display used to show power information.

Onn 4,000 mAh Battery Level Indicator

Does it show battery level?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether the power bank shows remaining battery level.

Onn 4,000 mAh Indicator Accuracy

How accurate is the battery indicator?

90 % 0 Votes
Onn 4,000 mAh
55.7 % (Average)

Measures how accurately the indicator reflects actual remaining power.

Onn 4,000 mAh Remaining Time Display

Does it display remaining time?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Shows estimated remaining usage or charging time.

Onn 4,000 mAh Button Type

What type of button does it use?

0 Onn 4,000 mAh 0 Votes Physical Button

0 Power Banks in this range Physical Button

Describes the type of button used for control.

Onn 4,000 mAh Button Count

How many buttons are there?

0 Onn 4,000 mAh 0 Votes 1

0 Power Banks in this range 1

Indicates the number of physical control buttons.

Safety & Protection Features 14

Onn 4,000 mAh Short Circuit Protection

Does it have short circuit protection?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Prevents damage when a short circuit is detected.

Onn 4,000 mAh Overcurrent Protection

Is overcurrent protection supported?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Protects devices from excessive current flow.

Onn 4,000 mAh Overvoltage Protection

Does it include overvoltage protection?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Prevents voltage levels from exceeding safe limits.

Onn 4,000 mAh Thermal Protection

Does it have thermal protection?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Shuts down or limits power when overheating is detected.

Onn 4,000 mAh Temperature Monitoring

Is temperature monitored internally?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Continuously monitors internal temperature.

Onn 4,000 mAh Foreign Object Detection

Does it detect foreign objects?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Detects abnormal objects or unsafe connections.

Thermal Management & Cooling 12

Onn 4,000 mAh Thermal Management System

Does it have a thermal management system?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether the power bank includes an integrated thermal management system.

Onn 4,000 mAh Heat Dissipation Method

How does it dissipate heat?

0 Onn 4,000 mAh 0 Votes Passive Cooling

0 Power Banks in this range Passive Cooling

Describes how heat is dispersed away from internal components.

Onn 4,000 mAh Internal Heat Sink

Is there an internal heat sink?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates the presence of an internal heat sink to absorb and spread heat.

Onn 4,000 mAh Thermal Sensor Count

How many thermal sensors are used?

0 Onn 4,000 mAh 0 Votes 1

0 Power Banks in this range 1

Specifies how many thermal sensors are used for temperature monitoring.

Onn 4,000 mAh Thermal Throttling

Does it support thermal throttling?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Reduces power output automatically to prevent overheating.

Onn 4,000 mAh Thermal Cutoff Threshold

At what temperature does it shut down?

140 °F 0 Votes
Onn 4,000 mAh
143.69 °F (Average)

Indicates the temperature at which the system shuts down to prevent damage.

Connectivity & Smart Features 8

Onn 4,000 mAh Bluetooth Connectivity

Does it support Bluetooth connectivity?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether the power bank can connect wirelessly to other devices.

Onn 4,000 mAh App Support

Is there app support?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Confirms whether a companion mobile app is available.

Onn 4,000 mAh Firmware Upgradable

Can the firmware be updated?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether firmware can be updated to improve functionality.

Onn 4,000 mAh Smart Power Monitoring

Does it offer smart power monitoring?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Provides real-time monitoring of power flow and usage.

Onn 4,000 mAh Device Usage Analytics

Does it provide usage analytics?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Tracks connected device charging behavior and patterns.

Onn 4,000 mAh Charging History Tracking

Is charging history tracked?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Records past charging sessions for review.

Environmental & Efficiency 6

Onn 4,000 mAh Energy Conversion Efficiency

What is the energy conversion efficiency?

80 % 0 Votes
Onn 4,000 mAh
85.52 % (Average)

Onn 4,000 mAh
Onn 4,000 mAh

Energy conversion efficiency of 80% indicates how effectively the power bank converts stored power into usable output.

Measures how efficiently stored energy is converted into usable output power.

Onn 4,000 mAh Idle Power Consumption

How much power is used while idle?

0.05 Watt 0 Votes
Onn 4,000 mAh
0.19 Watt (Average)

Onn 4,000 mAh
Onn 4,000 mAh

Idle power consumption of 0.05 Watt indicates low energy usage when the power bank is not actively charging a device.

Indicates how much power is consumed when the power bank is not actively charging devices.

Onn 4,000 mAh Eco Mode

Does it support eco mode?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Enables reduced power usage to improve efficiency and battery longevity.

Onn 4,000 mAh Automatic Power Optimization

Does it optimize power automatically?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Automatically adjusts output to reduce energy waste.

Onn 4,000 mAh Sustainable Materials

Does it use sustainable materials?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates use of environmentally friendly or recycled materials.

Onn 4,000 mAh Recycling Program

Is a recycling program supported?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates manufacturer support for recycling or take-back programs.

Included Accessories & Packaging 4

Onn 4,000 mAh Charging Cable

Is a charging cable included?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether a charging cable is included in the box.

Onn 4,000 mAh Carrying Case

Is a carrying case included?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether a protective carrying case is included.

Onn 4,000 mAh Wall Adapter

Is a wall adapter included?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether a wall charging adapter is provided.

Onn 4,000 mAh User Manual

Is a user manual included?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether a user manual or guide is provided.

Warranty & Support 6

Onn 4,000 mAh Warranty Length

How long is the warranty?

0 Onn 4,000 mAh 0 Votes 12 Months

0 Power Banks in this range 12 Months

Indicates the duration of the manufacturer warranty.

Onn 4,000 mAh Battery Warranty Coverage

Is the battery covered by warranty?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates whether the battery itself is covered under warranty.

Onn 4,000 mAh Technical Support Availability

Is technical support available?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Confirms access to technical support services.

Onn 4,000 mAh Support Channels

What support channels are available?

0 Onn 4,000 mAh 0 Votes Email, Phone

0 Power Banks in this range Email, Phone

Lists available customer support contact methods.

Onn 4,000 mAh Replacement Policy

Is there a replacement policy?

Yes 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Indicates eligibility for replacement in case of defects.

Onn 4,000 mAh Repair Service Availability

Are repair services available?

No 0 Votes Onn 4,000 mAh

Yes Power Banks in this range

Confirms whether repair services are offered.

Surveys

Because hot takes deserve votes.

Onn 4,000 mAh Charging Speed Performance

How fast does this power bank recharge devices in everyday use?

Ultra fast charging — Under 1.5 hours 0 Votes
Very fast charging — 1.5 to 3 hours 0 Votes
Moderate charging — 3 to 5 hours 0 Votes
Slow charging — 5 to 8 hours 0 Votes
Very slow charging — Over 8 hours 0 Votes

Onn 4,000 mAh Battery Capacity Satisfaction

How satisfied are you with the battery capacity of this power bank for daily needs?

Massive capacity for multiple days — Over 30000 mAh 0 Votes
Very high capacity — 20000 to 30000 mAh 0 Votes
Solid everyday capacity — 10000 to 19999 mAh 0 Votes
Limited capacity — 5000 to 9999 mAh 0 Votes
Barely useful capacity — Under 5000 mAh 0 Votes

Onn 4,000 mAh Output Power and Device Support

How well does this power bank handle charging different devices at once?

Handles everything with ease — 100 W or more 0 Votes
Strong multi device support — 60 to 99 W 0 Votes
Good for phones and tablets — 30 to 59 W 0 Votes
Basic output only — 15 to 29 W 0 Votes
Struggles with most devices — Under 15 W 0 Votes

Onn 4,000 mAh Port Selection and Flexibility

How flexible is this power bank when it comes to charging ports?

Covers all modern needs — USB C and USB A with fast charge 0 Votes
Very versatile — Multiple USB C and USB A ports 0 Votes
Good variety — USB C and USB A basic support 0 Votes
Limited options — Single USB C or USB A port 0 Votes
Very restrictive — One slow USB port only 0 Votes

Onn 4,000 mAh Size and Portability

How easy is this power bank to carry around daily?

Pocket friendly and lightweight — Under 8 ounces 0 Votes
Easy to carry — 8 to 12 ounces 0 Votes
Manageable but noticeable — 12 to 18 ounces 0 Votes
Bulky for daily carry — 18 to 24 ounces 0 Votes
Too heavy to carry around — Over 24 ounces 0 Votes

Onn 4,000 mAh Build Quality and Durability

How durable does this power bank feel during regular use?

Feels extremely solid and long lasting — Over 5 years expected use 0 Votes
Very durable — 3 to 5 years expected use 0 Votes
Decent build quality — 2 to 3 years expected use 0 Votes
Feels fragile — 1 to 2 years expected use 0 Votes
Cheap and unreliable — Under 1 year expected use 0 Votes

Onn 4,000 mAh Charging Stability

How stable is the charging output from this power bank during use?

Rock solid with no drops — Voltage variation under 3 percent 0 Votes
Very stable — 3 to 5 percent variation 0 Votes
Mostly stable — 5 to 8 percent variation 0 Votes
Occasional drops — 8 to 12 percent variation 0 Votes
Unstable charging — Over 12 percent variation 0 Votes

Onn 4,000 mAh Heat and Safety Performance

How well does this power bank control heat during charging and heavy use?

Stays cool and safe — Under 95 F 0 Votes
Slightly warm but comfortable — 95 to 104 F 0 Votes
Warm but acceptable — 104 to 113 F 0 Votes
Gets quite hot — 113 to 122 F 0 Votes
Uncomfortably hot and concerning — Over 122 F 0 Votes

Onn 4,000 mAh Battery Efficiency

How efficiently does this power bank convert stored energy into usable charging power?

Highly efficient with minimal loss — Over 90 percent efficiency 0 Votes
Very efficient — 85 to 90 percent efficiency 0 Votes
Decent efficiency — 75 to 84 percent efficiency 0 Votes
Noticeable energy loss — 65 to 74 percent efficiency 0 Votes
Poor efficiency — Under 65 percent efficiency 0 Votes

Onn 4,000 mAh Travel Friendliness

How convenient is this power bank for travel and daily commuting?

Perfect for travel and flights — No airline issues 0 Votes
Very travel friendly — Easy to pack and carry 0 Votes
Fine for occasional travel — Manageable size and weight 0 Votes
Awkward to carry on trips — Bulky or heavy 0 Votes
Not suitable for travel — Restricted or impractical 0 Votes

Reviews 0

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Average Rating

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