Battery for William Sound Sorin B0221 WS-BATPACK Amplifier CS-WS221SL 7.4v Compatible with the following devices Sound Sorin Compatible with Battery Part Numbers B0221, WS-BATPACK Capacity: 7.4V 1800mAh / 13.31Wh Dimensions: 70.00 x 50.00 x 10.50mm…