Bose S1 Pro+ Rechargeable Battery Pack

Key Features Lithium-Ion Battery for S1 Pro+ System Up to 11 Hours of Operating Time Highly Efficient for Full Output Permanently Installs in S1 Pro for Ease The Bose S1 Pro+ System Battery Pack allows you to power-up and play your Bose S1 Pro+ system for up to 11 hours at moderate levels or 5 hours at full volume. This lithium-ion battery installs easily into the dedicated compartment on your S1 Pro+ for secure and reliable use.