HQRP Kit: Battery and Charger for Harman Kardon Onyx, Onyx Studio Portable, Studio-2, Studio-3 - Walmart.com
ZZcell Battery Compatible for Harman Kardon Onyx Studio 4, ICR22650, 3
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
Replacement Battery for Harman/Kardon Onyx Studio 3
Battery for Harman/Kardon Onyx 4 studio 4 ICR22650 3000mAh/11.10Wh LIONX | eBay