Amazon.com: Pickle Power Battery for JBL Flip 4, Flip 4 Special Edition Bluetooth Speaker, P/N GSP872693 01 : Electronics
SOLVED: Flip 4's battery runs out quickly and other problems. - JBL Flip 4 - iFixit
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
JBL Charge 4 - Portable Bluetooth Speaker with built-in powerbank
Amazon.com: Pickle Power Battery for JBL Flip 4, Flip 4 Special Edition Bluetooth Speaker, P/N GSP872693 01 : Electronics
JBL Charge 4 review: Worth the money, kind of - SoundGuys
JBL Charge 4 Troubleshooting - iFixit
jbl charge 4) the speaker doesn't make any sound not even the little on/off chime. i tried connecting via aux and it still didn't work. also, the battery life indicator is on
JBL Charge 4 - Portable Bluetooth Speaker with built-in powerbank
How to Factory Reset JBL Charge 4 Bluetooth Speaker - YouTube