The Fenix ARB-L21-4000P is a high-performance battery designed to power 21700 high drain devices like your favorite flashlights, lanterns, and more. We love to pair it with Fenix LR35R flashlights!
Simply charge the Fenix 21700 battery using the built-in charging feature of the Fenix LR35R or using another compatible battery charger. With built-in overcharging and over-discharge protection, the ARB-L21-4000 is designed to last over 500 charge cycles. A 12 month free warranty period means you will never have to worry about this battery leaving you in the dark.