Power-up and play your Bose® S1 Pro system for up to 11 hours using the rechargeable S1 Battery Pack. This lithium-ion battery installs easily into the dedicated compartment on your S1 Pro for secure and reliable use. Use the Quick Charge feature to recharge your S1 Battery Pack in a hurry.

• 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
• Permanently install the battery inside the S1 Pro system for safe and easy charging