USED SureFire XSC Charger B12 Battery Black CH21. The dual-bay CH21 cradle charger can charge two B12 batteries simultaneously. Charge time for two batteries is up to 3 hours and the chargers included MICRO-USB to USB cable allows users to select multiple power sources including a wall charger adapter a vehicles auxiliary USB input or power port socket (adapter may be required) or a power bank. Every CH21 kit also includes a spare B12 lithium polymer battery. Charging status can be monitored via the B12s fuel gauge. Specifications for SureFire XSC Charger B12 Battery: Manufacturer: SureFire Color: Black Length: 2.47 in Width: 1.4 in Weight: 26 g Finish: Black Features of SureFire XSC Charger B12 Battery CH21 cradle charger can charge two B12 batteries at once when connected to a power source using a USB cable Charging time for two batteries is up to 3 hours MICRO-USB to USB cable included for easy interface with a variety of power sources at home or on the go Charging status can be monitored via the B12's fuel gauge Package Contents: SureFire XSC Charger B12 Battery SureFire CH21: XSC Charger B12 Battery Black