100% Original 4200mAh Replacement 3.7V Battery For JBL Flip 4 Flip4 Special Edition Pack Speaker GSP872693 01 Bateria Batteries - AliExpress
Amazon.com: WirelessFinest 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