2600mah Battery 3.7v For Harman Kardon Onyx Studio 1 & 2 & 3 Player Li Polymer Rechargeable Accumulator Replacement+track Code - Digital Batteries - AliExpress
Amazon.com: Cameron Sino 3400mAh Replacement Battery for Harman/Kardon Speaker LI11B001F Fits Onyx Studio 1 Onyx Studio 2 : Electronics
Harman Kardon Onyx Studio 3 Battery Replacement
Amazon.com: Replacement for Harman Kardon Onyx Battery, Pickle Power 3500mAh Battery for Harman Kardon Onyx Studio 4, Onyx Studio 3, Onyx Studio 2, Onyx Studio 1 Bluetooth Speaker : Electronics
Rapthor 3500mAh Rechargeable Replacement Battery for Harman Kardon Ony – Rapthor Batteries