Bose Professional S1 Pro System Battery Pack

• Up to 11 hours of play time when used at high-output levels for performance use you can count on
• Lithium-ion battery technology provides high energy density and full-output use of your S1 Pro system without compromising volume level
• Dual charge modes allow the S1 Battery Pack to be trickle-charged while the S1 Pro system is in use with AC power, or when not being used for play, the switchable Quick Charge mode can be used for rapid charging