JBL JB55 when I charge it, it works but when it's not, don't function

JBL JB55 when I charge it, it works but when it's not, don't function
Well, i got a gift yesterday a JBL JB55, it seems unknown in the world, because i can't find one in another place.

ANSWERS:

@krln this sounds like your battery needs to be replaced. Definitely not a common model. You do want to take some really good pictures of your headphones so we can see what they look like and hopefully help you with the battery replacement. Use this guide Adding images to an existing question for that.