Core Rechargeable BatteryBuy the Core High capacity 1250 mAh Lithium Ion rechargeable battery for Petzl headlamps featuring the HYBRID CONCEPT design: TIKKID, TIKKINA, TIKKA, ZIPKA, ACTIK, ACTIK CORE, TACTIKKA, TACTIKKA +, TACTIKKA +RGB, IKO CORE and IKO. Provides excellent lighting performance, even at low temperatures. It recharges directly with the integrated USB port. The CORE rechargeable battery offers an economical solution as the main power supply or as a back up