This is a lithium-ion rechargeable 18650 protected-cell battery. Its capacity is 2600 mAh. This battery was designed to be used in and recharged with our new Maelstrom Regen MMR-X only. It will not work with any of our other lights.
Warranty for Consumables: Since the 18650 battery is considered a "consumable" FOURSEVENS product, its warranty is 12 months. Please see our Warranty page for information about our FOURSEVENS warranties.