Amazon.com: WRUMI 4000mAh Replacement Battery for JBL Flip 4, Flip 4 Special Edition, Flip4, GSP872693 01 3.7V : Electronics
ORIGINAL JBL Flip 4 Parts Main Board/Speaker/Battery/Charging AUX Port Etc | eBay
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