The Fenix ARB-L18-4000 battery is a high capacity 18650, Li-ion cell, specifically designed for high drain devices such as high intensity flashlights and headlamps. The high capacity (4000mAh) provides excellent reliability in a compact design and ensures 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.

May not fit older Fenix torches - please measure your battery tube length and diameter before purchasing.

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.