JBL Flip 4 Reset Instructions, Solves Many Problems - Tom's Tek Stop
JBL Flip 3 Reset Instructions, to Solve Problems - Tom's Tek Stop
Do JBL Charge 3 and Flip 4 have battery issues? I've read a lot of reviews saying it keeps disconnecting or stops charging after a few months or a year. - Quora
Hard Reset JBL Flip 3, how to - HardReset.info
JBL Charge 3 Troubleshooting - iFixit
JBL Flip 2 Reset Instructions to Fix Problems - Tom's Tek Stop
SOLVED: JBL FLIP 4 water damage and glue problem? - JBL Flip 4 - iFixit