Must watch, if you don't want to damage the speaker!!! I show how to replace the battery in the JBL Charge4 Bluetooth speaker.
It is not that old yet, and i don't expect too many people to have an issue with the battery, but the day will come one day or another.
I am prepared to help you out! If you have a Charge4 you better subscribe, so you find my video when you need it.
Let me know your thoughts on this in the comments!
Where do you buy the new battery? I don't know yet, but i think Ebay or Amazon are places to start with, or you just make your own battery. The speaker has a simple 18650 based battery pack. I like that.