Vapcell M52 21700 Rechargeable Battery – 5200mAh with Protection

The Vapcell M52 battery is a high-quality 21700-format lithium-ion rechargeable cell manufactured in China. This model features built-in protection and a raised positive terminal.

The rated capacity is 5200mAh, and the minimum guaranteed capacity is 5000mAh. It is suitable for flashlights and devices compatible with batteries with a protruding positive terminal.

Technical Specifications

Specifications	Value
Type	21,700 INR
Model	Vapcell M52 with a standout feature
Rated Capacity	5,200 mAh
Minimum capacity	5,000 mAh
Rated voltage	3.6V
Voltage at the end of charging	4.20 V
Voltage at the end of the discharge	2.5V
Maximum continuous discharge current	15A
Maximum instantaneous discharge current	25A (for 5 seconds)
Normal charging	1500 mA
Fast Charging	3000 mA
Elevation	71 mm
Diameter	21.2 mm
Weight	72 years
Production	China

A battery with or without protection?

Batteries with protection circuits contain a small circuit board mounted in the anode or cathode. It protects the cell from overcharging, over-discharging, and excessive current—when critical values are reached, the protection circuit shuts off.

Batteries with built-in protection and a raised positive terminal are suitable for flashlights with mechanical reverse-polarity protection. Examples include models from Acebeam, Olight, Fenix, Nitecore, and Armytec.

It's important to know that protected batteries are slightly longer and wider than standard ones. Therefore, they aren't compatible with all flashlights—some devices require a standard size or a higher discharge current.

Check the dimensions of the original battery in mm before purchasing
Compare with the device's technical specifications
If you have any questions, please contact us for advice

Instructions for Use

Charge the battery using a high-quality Li-Ion charger before using it for the first time
Do not use in high temperatures or humid environments
Operating temperature during charging: 0°C to 45°C
Operating temperature when diluted: -20°C to 75°C
Storage temperature: -5°C to 35°C
Do not throw into fire or water—risk of ignition and explosion
Do not crush, hit, or take apart
Keep out of reach of children
The battery gets hot during use—handle with care after use
If the device has been stored for more than 3 months, charge the battery before use

Safety Rules

Do not modify, puncture, or cut the battery
Don't short-circuit anything
Do not expose to water, fire, or extreme temperatures
Do not use in defective devices
Do not overcharge or undercharge
Do not charge at sub-zero temperatures
Do not use if the protective film is damaged
Store in a protective case—not in a pocket or purse

Frequently Asked Questions

What is the difference between a Vapcell M52 21700 battery with protection and one without protection?

The Vapcell M52 21700 battery with protection features a built-in circuit board that monitors voltage and current levels. It automatically shuts off in the event of overcharging, over-discharging, or excessive current to protect the cell. Unprotected batteries do not have this circuit board and are more compact. They are suitable for devices designed for the standard 21700 size or requiring a higher discharge current. Protected batteries are slightly longer and wider, so they do not fit in some flashlights.

Which flashlights is the Vapcell M52 battery with a raised positive terminal suitable for?

The model with a protruding positive terminal is compatible with flashlights that have mechanical reverse-polarity protection. This includes many models from the brands Acebeam, Olight, Fenix, Nitecore, and Armytec. These flashlights are specifically designed to work with batteries that have a protruding positive terminal. It is important to check whether your flashlight supports a protected battery measuring 71 mm in height and 21.2 mm in diameter before making a purchase.

What is the actual capacity of the Vapcell M52 5200mAh battery?

The rated capacity of the Vapcell M52 is 5200mAh, and the minimum guaranteed capacity is 5000mAh. The rated voltage is 3.6V. The maximum continuous discharge current is 15A, and the maximum peak discharge current reaches 25A for a period of 5 seconds. These specifications make the battery suitable for devices with moderate to higher current consumption.

How do I properly charge the Vapcell M52 21700 battery?

Before first use, the battery must be charged using a high-quality charger designed for lithium-ion batteries. The normal charging current is 1500 mA, and 3000 mA for fast charging. Do not charge at sub-zero temperatures. Charging must be performed at a temperature between 0°C and 45°C. The voltage at the end of charging is 4.20 V.

How do I store the Vapcell M52 battery safely?

The battery must be stored in a protective case—never in a pocket or bag without protection. The recommended storage temperature is between -5°C and 35°C. Avoid moisture, direct fire, and high temperatures. If the battery has not been used for more than 3 months, it must be charged before its next use. Do not use the battery if the protective film is damaged.

How can I tell if a 21700 battery will fit in my flashlight?

The most reliable way is to measure the dimensions of the original battery in millimeters and compare them to the specifications of the Vapcell M52—71 mm in height and 21.2 mm in diameter. Protected batteries are slightly longer and wider than unprotected ones, so it’s important that the flashlight is designed for protected batteries. If in doubt, you can contact the Dulotec.COM team for further advice.

Is the Vapcell M52 battery safe for daily use?

When used and stored properly, the battery is safe. The built-in protection circuit prevents dangerous situations such as overcharging, over-discharging, and current surges. Do not crush, strike, disassemble, or expose the battery to fire or water. The battery heats up during operation, so handle it with care after use. Strictly follow the instructions for use and safety guidelines to ensure maximum battery life and safety.