Hi,
Dissemble the JBL Charge 3 is relatively similar to the Xtreme and also by follow Youtube (just search keyword 'Charge 3 Dissemble')
To get the battery out, you have to take out the right side radiator:
- Notice there is two plastic latches, you need to lift both up using some small metal part as the leverages
[https://drive.google.com/open?id=0B5CLmEgNHQ__X0E1WHZtX1d0WnM]
- While both latches are up and hold the speakers, trying to turn the radiator anti-clockwise
- This can be hard as first but no worry and there is no cable connect to the radiator
- As you turn about 1.5cm (or can not turn further), just take out the radiator cap
[https://drive.google.com/open?id=0B5CLmEgNHQ__dlFOYzQxSHZlbnc]
- Take out the cable connect to the battery
Note: no need to take out the speaker part.