Chosen Solution
My Flip 4, only bought it for like half an year, is having a battery issue where it runs real quick. And when it charges, I find some problems like stopping the blink (which indicates it is being charged) stops at 4 point and never run to 5th unless I plug it in, again. And the sounds are getting distorted when the light hit red which indicates the battery has run short. I get it if the battery is efficiently using the juice by not using its full sound quality but when I turn up the volume at that moment, the battery runs out and the speaker shuts down. I bought it as my travel accessory and it doesn’t quite help me with my purpose.
If your JBL Flip 4 speaker will not charge or won’t hold a charge, see the JBL Flip 4 Will Not Charge Or Won’t Hold a Charge problem page for possible causes and solutions. All of this sounds like a failed battery. I would suggest that you replace it and then re-evaluate your Flip4. This video will show you how to replace it.
Upgrade software through JBL connect app. Not a battery issue.
