Charge Your XSC The Right Way.The SureFire CH21 Charger Cradle Kit provides quick and easy charging capability for the B12 battery that powers the SureFire XSC WeaponLight. The dual-bay CH21 cradle charger can charge two B12 batteries simultaneously. Charge time for two batteries is up to 3 hours, and the charger’s included MICRO-USB to USB cable allows users to select multiple power sources, including a wall charger adapter, a vehicle’s auxiliary USB input or power port socket (adapter may be required), or a power bank.