Amazon.com: Tectra Rechargeable Battery Replacement for JBL Flip 4, Flip 4 Special Edition, Fits for JBL GSP872693 01 (3.70V 3200mAh/11.84Wh) : Electronics
Amazon.com: High Capacity Replacement Battery + Tool for JBL Flip 4 Speaker or Special Edition Model GSP872693 Li-Polymer 3.70V 3000mAh/11.10Wh Repair Power : Electronics