Bose S1 Battery Pack Rechargeable Battery Pack for S1 Pro

About this product: Up to 11 hours of long, high-output playback on a single charge. By working with lithium-ion battery technology that achieves high energy density, full output is possible without compromising volume levels. Supports two charging modes. Connects to AC power and switches to normal charging mode when in use and quick charge mode when not in use.Battery can be permanently attached to the main unit for easy and safe charging.Compatible products: S1 Pro system