Amazon.com: HQRP Battery Compatible with Harman Kardon Onyx Studio, Onyx Studio-2 Studio-II, Studio-3, Studio-4 Wireless Bluetooth Speaker System LI11B001F : Electronics
Replace Battery for Harman Kardon Onyx Studio 4/3/2/1 Wireless Bluetooth Speaker | eBay
How to Replace the Battery in a Harman Kardon Onyx Studio 1/ 2/ 3/ 4 - YouTube
ZZcell Battery Compatible for Harman Kardon Onyx Studio 4, ICR22650, 3.7Volts 3000mAh - Walmart.com
Battery for LI11B001F Harman/Kardon Onyx studio 1, Onyx Studio 2 ,Onyx – American Battery Store
Amazon.com: Kratax 3500mAh Rechargeable Replacement Battery for Harman Kardon Onyx Studio 1/2/3/4 Wireless Bluetooth Speaker, Real Capacity HK Onyx Battery, Same Quality as Original Battery : Electronics
ZZcell Battery For Harman Kardon Onyx Studio 5, 6, HKOS6GRYSG, HKOS6BLKSG, ID997 | eBay