Amazon.com: Harman Kardon Onyx Studio 3 Wireless Speaker System with Rechargeable Battery and Built-in Microphone - White : Electronics
Amazon.com: FIVO Replacement Battery for Harman Kardon Onyx Studio, Onyx Studio 2 and Onyx Studio 3 Wireless Bluetooth Speaker, 3.7v 2600mAh : Electronics
For Harman Kardon Onyx Studio 3 Original PR-633496 Battery Replacement