SureFire XSC 3.7V Lithium Polymer Battery Black. The compact B12 powers the 350-lumen XSC for up to 30 minutes. Its charge status can be checked quickly by pressing the push-button fuel gauge switch located on the side of the battery and observing the green yellow and red LED indicators. Specifications for SureFire XSC 3.7V Lithium Polymer Battery: Manufacturer: SureFire Color: Black Length: 5 in Weight: 0.4 oz Condition: New Battery Type: 3.7V Lithium Polymer Battery Features of SureFire XSC 3.7V Lithium Polymer Battery The genuine power source for the SureFire XSC micro-compact WeaponLight Quickly detaches from XSC chassis for fast battery swaps Saves money by offering convenient rechargeability with SureFire's CH21 Cradle Charger Package Contents: SureFire XSC 3.7V Lithium Polymer Battery Warranty on XSC Charger and Battery: 2 years SureFire B12: XSC 3.7V Lithium Polymer Battery Black