QSC CB-BATTERY CB10 BatteryThe 22. 2V QSC CB10 Battery will power your QSC CB10 Compact Battery Powered Loudspeaker System for up to 12 hours on a single charge, and it is suitable as a power back should AC power fail or not be available at your location. User replaceable, simply loosen the battery's integrated lugs using the finger tabs or a flat head screwdriver, remove the battery and replace it with a fresh one to power your speaker or charge the battery when AC power is