Keeppower 26650 6000mAh – High-Discharge Rechargeable Battery Without Protection

The Keeppower UH2660 is a high-quality lithium-ion rechargeable battery with a capacity of 6000 mAh and a maximum discharge current of up to 30A. It is suitable for high-powered flashlights that require a high current and a standard-size battery without a protection circuit.

Key Features

Capacity: 6,000 mAh
Rated voltage: 3.7 V
Charging end voltage: 4.20 V
Discharge-end voltage: 2.5 V
Maximum continuous discharge current: 15A
Maximum discharge current: 30A
Normal charging: 2000 mA
Fast charging: 4200 mA
Over 300 charge-discharge cycles
Terminal type: protruding plus—allows contact between batteries in flashlights with two or more cells
Weight: about 98 g
Dimensions: height 66.6 mm, diameter 26.3 mm (±0.2 mm)

Unprotected Battery—Who Is It Suitable For?

Batteries without a protection circuit are more compact and can deliver a higher current. They are suitable for flashlights designed for a standard cell size, such as models from Zebralight and Dulotec.

Protected batteries contain a small circuit board in the anode or cathode that protects against overcharging, over-discharging, and excessive current. They are slightly longer and wider and are not compatible with all flashlights. They are suitable for brands such as Acebeam, Olight, Fenix, Nitecore, and Armytec, provided the flashlight has mechanical reverse-insertion protection.

The easiest way to choose the right battery is to measure the original battery cell in the flashlight and compare the dimensions with the technical specifications. If necessary, you can contact us for advice.

Operating Instructions

Charge the battery using a high-quality lithium-ion battery charger before using it for the first time.
Do not use in high temperatures or humid environments.
Operating temperature: charging from 0°C to 45°C, discharging from -20°C to 75°C.
Storage temperature: -5°C to 35°C.
Do not throw the battery into fire or water.
Do not crush, strike, or disassemble the battery.
Keep it out of the reach of children.
The battery gets hot during use—handle with care after use.
If stored for more than 3 months, charge the battery before use.
Always store it in a protective case, not in a pocket or purse.

Safety Rules

Do not modify, puncture, cut, or short-circuit the device.
Do not expose to water, fire, or extreme temperatures.
Do not use in defective devices.
Do not charge at sub-zero temperatures.
Do not use the battery if the foil is damaged.
Do not overcharge or over-discharge the battery.

Specifications	Value
Brand	Keeppower
Model	UH2660
Type	Unprotected lithium-ion rechargeable battery
Capacity	6,000 mAh
Rated Voltage	3.7 V
Voltage at the end of charging	4.20 V
Voltage at the end of the discharge	2.5 V
Maximum continuous discharge current	15 A
Maximum discharge current	30 A
Normal charging	2000 mA
Fast Charging	4,200 mA
Number of charge-discharge cycles	over 300
Peak Type	A major advantage
Elevation	66.6 mm (±0.2 mm)
Diameter	26.3 mm (±0.2 mm)
Weight	around 98 A.D.
Operating Temperature During Charging	0°C to 45°C
Operating temperature under rarefaction	-20°C to 75°C
Storage Temperature	-5°C to 35°C

Frequently Asked Questions

What is the difference between a 26650 battery with protection and one without protection?

Unprotected batteries do not have an added circuit board and are more compact in size, closer to the standard. They can deliver a higher discharge current, making them suitable for devices designed for a standard cell size. Protected batteries contain a small circuit board that protects against overcharging, over-discharging, and excessive current. They are slightly longer and wider and are not compatible with all flashlights. If in doubt, measure the original battery and compare the dimensions.

What types of flashlights is the Keeppower 26650 battery (without protection) suitable for?

This battery is suitable for flashlights designed to work with cells that do not have a protection circuit and are standard 26650 size. Examples of such brands include Zebralight and Dulotec. If your flashlight requires a battery with a higher current or standard dimensions, the unprotected battery is the right choice. If you need advice, please contact the Dulotec.COM team.

How many charge cycles does the Keeppower UH2660 battery last?

The Keeppower UH2660 battery supports over 300 charge-discharge cycles. It is important to note that using very high currents during charging and discharging reduces the number of cycles. For a longer service life, normal charging at 2000 mA is recommended instead of fast charging at 4200 mA.

How do I properly charge the Keeppower 26650 battery?

Use a high-quality charger designed for lithium-ion batteries. Charge the battery before using it for the first time. Do not charge at sub-zero temperatures—the operating temperature range for charging is 0°C to 45°C. Do not overcharge or over-discharge the battery. If the battery has not been used for more than 3 months, charge it before use.

What are the dimensions of the Keeppower 26650 battery?

The Keeppower UH2660 battery has the following dimensions: 66.6 mm in height and 26.3 mm in diameter, with a tolerance of ±0.2 mm. It weighs approximately 98 grams. These dimensions are standard for the 26650 format and are important when selecting a compatible flashlight.

How do I safely store the Keeppower 26650 battery?

Store the battery at a temperature between -5°C and 35°C, in a dry place protected from direct sunlight. Never leave it in a pocket or bag without a protective case. Do not expose it to water, fire, or extreme temperatures. Do not use the battery if the protective film is damaged or if there is visible damage.

How can I tell which battery is right for my flashlight?

The most reliable way is to measure the flashlight’s original battery—height and diameter in millimeters—and compare those measurements to the technical specifications of the new battery. Also check whether the flashlight requires a battery with or without protection. If you have any trouble, you can contact the Dulotec.COM team, who will help you choose the right battery for your device.