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Get the facts before you unbox. The Onn Slim power bank features 139 key specs & features, with general information, battery & capacity, charging input performance & power output performance topping the list.
Cycle Life Rating: 300–500 Cycles Indicates the estimated number of full charge cycles the battery can complete before noticeable capacity degradation.
A fast snapshot of the Onn Slim, covering its standout specification and what you can expect right out of the box.
Onn Slim
Onn Slim is a compact portable power bank sold by Walmart, designed to charge smartphones, tablets, and other USB-powered devices on the go. It typically features a 5,000mAh capacity, a slim design, LED indicators, and multiple output ports (USB-A, USB-C) for versatile charging. It's known as an affordable, basic charging solution for everyday use or travel, offering essential power for one or two devices.
Specifications & Facts 139
Specs measured. Drama avoided.
Think you know gadgets? Check out the full scoop on the Onn Slim power bank: specs, votes, pros, cons, and how it measures up to competing power banks.
General Information 10
Onn Slim Operating Temperature Maximum
What is the maximum operating temperature?
113 °F 0Votes
107.04 °F (Average)
Onn Slim
The maximum operating temperature is 113 °F (45 °C), indicating it’s designed to function safely in warm environments.
Defines the highest ambient temperature the power bank can operate safely.
When it comes to Operating Temperature Maximum, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 6.0 °F measurement.
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Onn Slim Product Type
What is the product type?
46 Onn Slim 0 Votes Portable Battery
18 Power Banks in this range Power Bank
Identifies the functional category of the portable charging device.
When it comes to Product Type, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 28 score measurement.
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Onn Slim Color Options
What color options are available?
67 Onn Slim 0 Votes Black
20 Power Banks in this range Black
Lists the available exterior color choices.
When it comes to Color Options, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 47 score measurement.
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17 Power Banks in this range Smartphone Charging, Tablet Charging, Travel Backup, Emergency Power
Describes the primary usage scenarios the power bank is designed for.
When it comes to Intended Use Case, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 43 score measurement.
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Onn Slim Release Year
What is the release year?
76 Onn Slim 0 Votes 2022
25 Power Banks in this range 2024
Indicates the year the product was first released to market.
When it comes to Release Year, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 51 score measurement.
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Onn Slim Country of Origin
Where is this product made?
66 Onn Slim 0 Votes China
19 Power Banks in this range China
States the country where the product is manufactured or assembled.
When it comes to Country of Origin, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 47 score measurement.
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Onn Slim Finish Type
What type of finish does it have?
56 Onn Slim 0 Votes Matte
17 Power Banks in this range Matte
Describes the surface finish of the exterior shell.
When it comes to Finish Type, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 39 score measurement.
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Onn Slim Rugged Design
Does it have a rugged design?
No 0Votes Onn Slim
Yes Power Banks in this range
Indicates whether the power bank is built for enhanced durability.
When it comes to Rugged Design, Onn Slim ◉ is worse than Power Bank in this range ◉ .
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Onn Slim Operating Temperature Minimum
What is the minimum operating temperature?
32 °F 0Votes
31.56 °F (Average)
Defines the lowest ambient temperature the power bank can operate safely.
When it comes to Operating Temperature Minimum, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 0.4 °F measurement.
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Onn Slim Storage Temperature Range
What is the storage temperature range?
56 Onn Slim 0 Votes 32–113°F
17 Power Banks in this range 32–113°F
Specifies safe temperature conditions for storing the power bank when not in use.
When it comes to Storage Temperature Range, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 39 score measurement.
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Battery & Capacity 14
Onn Slim Battery Capacity
What is the battery capacity?
5,000 mAh 0Votes
10,395.86 mAh (Average)
Onn Slim
The battery capacity is 5000 mAh, sufficient for several full charges of standard smartphones.
States the total energy storage capacity of the battery cells.
When it comes to Battery Capacity, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 5,395.9 mAh measurement.
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Onn Slim Battery Cell Type
What type of battery cell does it use?
66 Onn Slim 0 Votes Pouch
20 Power Banks in this range Pouch
Onn Slim
The battery cells use a pouch type design that is lightweight and flexible. This format allows for slimmer power bank profiles compared to cylindrical cells.
Indicates the physical form factor of the battery cells used.
When it comes to Battery Cell Type, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 46 score measurement.
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Onn Slim Battery Chemistry
What battery chemistry is used?
46 Onn Slim 0 Votes Lithium-Polymer
14 Power Banks in this range Lithium-Polymer
Onn Slim
Battery chemistry is Lithium-Polymer, which is known for its flexible shape and safety.
Defines the chemical composition of the battery cells.
When it comes to Battery Chemistry, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 32 score measurement.
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Onn Slim Cell Count
How many battery cells are used?
6 Onn Slim 0 Votes 1
6 Power Banks in this range 1
Onn Slim
The battery configuration includes a single cell design.
Shows the number of battery cells inside the power bank.
When it comes to Cell Count, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Cycle Life Rating
What is the cycle life rating?
46 Onn Slim 0 Votes 300–500 Cycles
15 Power Banks in this range 300–500 Cycles
Onn Slim
The battery supports between 300–500 cycles, which is a moderate lifespan for typical usage.
Indicates the estimated number of full charge cycles the battery can complete before noticeable capacity degradation.
When it comes to Cycle Life Rating, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 31 score measurement.
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Onn Slim Self-Discharge Rate
What is the self-discharge rate?
3 % 0Votes
9.96 % (Average)
Onn Slim
Self-discharge rate is low at 3%, minimizing power loss when stored.
Indicates how much charge is lost when not in use.
When it comes to Self-Discharge Rate, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 7.0 % measurement.
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Onn Slim Overcharge Protection
Is overcharge protection supported?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Onn Slim
Includes overcharge protection to safeguard battery life and connected devices from damage.
Prevents damage from charging beyond safe limits.
When it comes to Overcharge Protection, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Battery Protection System
Does it include a battery protection system?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Confirms presence of integrated battery protection circuitry.
When it comes to Battery Protection System, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Rated Capacity
What is the rated capacity?
5,000 mAh 0Votes
9,048.86 mAh (Average)
Indicates the usable output capacity after conversion losses.
When it comes to Rated Capacity, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 4,048.9 mAh measurement.
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Onn Slim Energy Rating
What is the energy rating?
18.5 Watt 0Votes
53.22 Watt (Average)
Measures total energy stored expressed in watt-hours.
When it comes to Energy Rating, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 34.7 Watt measurement.
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Onn Slim Battery Voltage
What is the battery voltage?
3.7 Volt 0Votes
3.96 Volt (Average)
Indicates the nominal voltage of the battery pack.
When it comes to Battery Voltage, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 0.3 Volt measurement.
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Onn Slim Battery Configuration
What is the battery configuration?
16 Onn Slim 0 Votes Single Cell
12 Power Banks in this range Single Cell
Describes how battery cells are electrically arranged to achieve desired voltage and capacity.
When it comes to Battery Configuration, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 4 score measurement.
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Onn Slim Standby Power Loss
How much power is lost in standby?
0.1 Watt 0Votes
1.53 Watt (Average)
Measures power lost while the unit is idle.
When it comes to Standby Power Loss, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 1.4 Watt measurement.
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Onn Slim Overdischarge Protection
Is overdischarge protection supported?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Prevents battery depletion below safe voltage levels.
When it comes to Overdischarge Protection, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Charging Input Performance 10
Onn Slim Input Port Type
What input port types are supported?
36 Onn Slim 0 Votes Micro-USB
23 Power Banks in this range USB-C
Onn Slim
Uses a Micro-USB input port, which may limit compatibility with newer cables but is still common.
Identifies the physical port types used to recharge the power bank.
When it comes to Input Port Type, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 13 score measurement.
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Onn Slim Maximum Input Power
What is the maximum input power?
10 Watt 0Votes
18.37 Watt (Average)
Onn Slim
The maximum input power is 10 Watt, which impacts the recharge speed of the unit.
Shows the maximum power the power bank can accept while charging.
When it comes to Maximum Input Power, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 8.4 Watt measurement.
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Onn Slim Input Current Rating
What is the input current rating?
2 Amp 0Votes
2.37 Amp (Average)
Onn Slim
The input current rating is 2 Amp, which supports reasonably fast recharging of the power bank.
Defines the maximum current the power bank can draw during charging.
When it comes to Input Current Rating, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 0.4 Amp measurement.
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Onn Slim USB-C Input
Is USB-C input supported?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Onn Slim
Includes USB-C input port for faster and more universal charging compatibility.
Confirms whether USB-C can be used as a charging input.
When it comes to USB-C Input, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Input Port Count
How many input ports does it have?
6 Onn Slim 0 Votes 1
4 Power Banks in this range 1
Indicates how many input ports are available for charging.
When it comes to Input Port Count, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 2 score measurement.
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Onn Slim Input Voltage Range
What input voltage range is supported?
13 Onn Slim 0 Votes 5V
13 Power Banks in this range 5V
Specifies the supported voltage range for charging input.
When it comes to Input Voltage Range, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Fast Input Charging
Does it support fast input charging?
No 0Votes Onn Slim
Yes Power Banks in this range
Indicates whether fast-charging input standards are supported.
When it comes to Fast Input Charging, Onn Slim ◉ is worse than Power Bank in this range ◉ .
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Onn Slim Pass-Through Charging
Does it support pass-through charging?
No 0Votes Onn Slim
Yes Power Banks in this range
Allows the power bank to charge devices while being charged itself.
When it comes to Pass-Through Charging, Onn Slim ◉ is worse than Power Bank in this range ◉ .
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Onn Slim Charging Efficiency
What is the charging efficiency?
85 % 0Votes
85.3 % (Average)
Measures how efficiently input power is converted to stored energy.
When it comes to Charging Efficiency, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 0.3 % measurement.
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Onn Slim Charging Time
How long does it take to fully recharge?
2.5 hour 0Votes
3.69 hour (Average)
Estimates total time required to fully recharge the power bank.
When it comes to Charging Time, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 1.2 hour measurement.
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Power Output Performance 14
Onn Slim Fast Charging Technology
Which fast charging technologies are supported?
0 Onn Slim 0 Votes Power Delivery
0 Power Banks in this range Power Delivery
Onn Slim
Utilizes Power Delivery fast charging technology for efficient power transfer.
Lists supported fast-charging standards.
When it comes to Fast Charging Technology, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Output Stability
How stable is the output power?
0 Onn Slim 0 Votes Stable
0 Power Banks in this range Stable
Onn Slim
Output stability is rated as Stable, ensuring steady power delivery during use.
Describes how consistently the power bank maintains output power under varying load conditions.
When it comes to Output Stability, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Voltage Regulation Accuracy
How accurate is the voltage regulation?
0 Onn Slim 0 Votes Good
0 Power Banks in this range Good
Onn Slim
Voltage regulation accuracy is rated as Good, ensuring stable voltage output to connected devices.
Indicates how precisely the power bank maintains target voltage levels during charging.
When it comes to Voltage Regulation Accuracy, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Output Port Type
What output port types are available?
56 Onn Slim 0 Votes USB-A
21 Power Banks in this range USB-A, USB-C
Identifies the physical ports used to deliver power to devices.
When it comes to Output Port Type, Onn Slim ◉ is better than Power Bank in this range ◉ , delivering higher 35 score measurement.
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Onn Slim Maximum Output Power
What is the maximum output power?
2.4 Watt 0Votes
19.81 Watt (Average)
Shows the highest power level supported by a single output.
When it comes to Maximum Output Power, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 17.4 Watt measurement.
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Onn Slim Output Port Count
How many output ports does it have?
0 Onn Slim 0 Votes 2
0 Power Banks in this range 2
Indicates how many devices can be physically connected at once.
When it comes to Output Port Count, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Total Output Power
What is the total output power?
10 Watt 0Votes
20.13 Watt (Average)
Measures the combined power available when using multiple ports.
When it comes to Total Output Power, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 10.1 Watt measurement.
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Onn Slim Output Voltage Range
What output voltage range is supported?
0 Onn Slim 0 Votes 5V
0 Power Banks in this range 5V
Defines the voltage levels supported for device charging.
When it comes to Output Voltage Range, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Output Current Rating
What is the output current rating?
2 Watt 0Votes
10.77 Watt (Average)
Represents the power delivery capability under load conditions.
When it comes to Output Current Rating, Onn Slim ◉ is worse than Power Bank in this range ◉ , delivering equal 8.8 Watt measurement.
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Onn Slim Simultaneous Device Charging
Can it charge multiple devices simultaneously?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Indicates whether multiple devices can be charged at once.
When it comes to Simultaneous Device Charging, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Power Distribution Control
Does it manage power distribution automatically?
No 0Votes Onn Slim
Yes Power Banks in this range
Ensures balanced power delivery across connected devices.
When it comes to Power Distribution Control, Onn Slim ◉ is worse than Power Bank in this range ◉ .
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Onn Slim Load Detection
Does it detect connected device load?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Automatically detects connected devices to optimize power output.
When it comes to Load Detection, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Low-Power Device Mode
Is there a low-power device mode?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Enables safe charging for small electronics like earbuds.
When it comes to Low-Power Device Mode, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Auto Shut-Off
Does it auto shut off when idle?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Automatically stops output when no device is connected.
When it comes to Auto Shut-Off, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Charging Protocols & Compatibility 12
Onn Slim USB Power Delivery
Does it support USB Power Delivery?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Indicates support for the USB Power Delivery fast charging standard.
When it comes to USB Power Delivery, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Quick Charge
Is Quick Charge supported?
No 0Votes Onn Slim
Yes Power Banks in this range
Confirms compatibility with Qualcomm Quick Charge standards.
When it comes to Quick Charge, Onn Slim ◉ is worse than Power Bank in this range ◉ .
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Onn Slim Programmable Power Supply
Does it support PPS charging?
No 0Votes Onn Slim
Yes Power Banks in this range
Indicates support for Programmable Power Supply charging.
When it comes to Programmable Power Supply, Onn Slim ◉ is worse than Power Bank in this range ◉ .
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Onn Slim Apple Charging Compatibility
Is it compatible with Apple devices?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Ensures optimized charging for Apple devices.
When it comes to Apple Charging Compatibility, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Samsung Charging Compatibility
Is it compatible with Samsung devices?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Confirms optimized charging for Samsung devices.
When it comes to Samsung Charging Compatibility, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Laptop Charging
Can it charge laptops?
No 0Votes Onn Slim
Yes Power Banks in this range
Indicates ability to charge laptops via USB-C output.
When it comes to Laptop Charging, Onn Slim ◉ is worse than Power Bank in this range ◉ .
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Onn Slim Tablet Charging
Can it charge tablets?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Confirms reliable charging for tablets and large devices.
When it comes to Tablet Charging, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Wearable Device
Does it support wearable devices?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Indicates compatibility with smartwatches and wearables.
When it comes to Wearable Device, Onn Slim ◉ is same as Power Bank in this range ◉ .
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Onn Slim Low-Current Device
Does it support low-current devices?
Yes 0Votes Onn Slim
Yes Power Banks in this range
Enables safe charging for devices requiring very low current.
When it comes to Low-Current Device, Onn Slim ◉ is same as Power Bank in this range ◉ .
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