Fenix ARB-L21-4000P High Power 21700 Battery

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Availability: In stock

Li-ion 21700 battery
3.7v nominal
4000mAh capacity


Place your order now and it will leave our warehouse 
Tuesday 20th April 2021



Please note that due to international postal regulations we are unable to ship Li-ion batteries outside of the Mainland United Kingdom unless they are fitted inside a flashlight, headlamp, bike light or lantern. If this is the case any other non rechargeable batteries which would normally be supplied will be removed.

The Fenix ARB-L21-4000P 21700 battery is designed to deliver in high current applications such as the Fenix LR35R search and rescue torch.

Capable of a continuous current drain of up to 10A and a peak maximum of 18A, this rechargeable Li-ion battery offers high current delivery combined with high capacity making it longer lasting than 18650 batteries in similar environments
As with most Fenix batteries the ARB-L21-4000P features overcharge, over-discharge, overheat and short circuit protection as standard combined with a steel shell to protect against impact.

Please note that this item is larger than an 18650 sized battery and will not fit in products designed to take 18650 cells.


Brand Fenix
Charging Info Recommended charge current 1A, Maximum charge current 4A in external charger.
Safety Info For further information and safety precautions for Li-ion batteries please visit http://batteryuniversity.com/learn/
Further Info Li-ion batteries should never be left charging unattended under any circumstances. The user must have knowledge of how to charge and discharge Li-ion batteries before using them. Always use a charger that is designed to recharge the particular Li-ion cell that you wish to recharge. Never use a DC adapter to charge Li-ion batteries. We are NOT responsible for any damage that is caused by the misuse of Li-ion batteries. We recommend charging any Li-ion cell on a metal or other non-flammable surface.

Retail packaged Fenix ARB-L21-4000P 21700 Rechargeable Lithium Battery

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