The Fenix ARB-L18-4000U battery is an ultra-high capacity 18650 li-ion cell, specifically designed for high drain devices such as high intensity flashlights and headlamps. It has a built-in USB-C port for direct charging into the battery using a USB-C cable (not included). Alternatively the battery can be recharged in a compatible charger or inside compatible torches.

Please note, the battery has an extended length and will only fit later Fenix models, including: TK11 TAC, TK11R, TK26R, HM61R V2.0, HM62-T, HM75R, CL30R, E28R V2.0, LD30R, PD32R, HM65R Shadow Master and HM65R-T V2.0. Please ensure your battery tube depth is at least 72.5 mm for compatibility.

The high capacity (4000mAh) provides excellent reliability and optimum runtimes.

The battery features a built-in protection circuit for damage resistance, triple overheat protection and built-in overcharge and over discharge protection, for safety and reliability.

Please note all orders for individual batteries without a device are sent via Royal Mail 48 Tracked, and not Royal Mail 24 Tracked or Special Delivery. Due to shipping restrictions, we are unable to send power banks to the Outer Hebrides, Scottish Highlands and surrounding areas, Channel Islands and Northern Ireland. Please see our delivery page for further details.