JBL Flip 4 battery replacement || How to replace Cameron Sino battery CS-JMF310SL - YouTube
JBL Flip 4 Bluetooth Speaker | Repair | Disassembly | Alternative Battery Replacement - YouTube
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
Kastar Battery for JBL Flip 4, Flip 4 Special Edition Replace JBL GSP872693 01 - Walmart.com
Amazon.com: KH KAM HUA Flip 3 Battery Replacement Compatible for JBL Flip 3, JBLFLIP3GRAY, (3.7V, 3000mAh, GSP872693 Battery) : Electronics