A:Answer Thanks for bringing this to our attention. To isolate the battery issue with your JBL Flip 4, try a different cable or adapter, test on another wall outlet, or clean the charging port with compressed air. If the issue remains, please contact us at (877) 871-6755 / Mon - Fri: 9:00 am - 11:00 pm (ET) Sat-Sun: 9:00 am - 5:00 pm (ET).