SL Battery

Hēy. I read a few topics about the battery replacement but nothing was clear.

I gave bought my second Meizu M6 and the same problem occours again. The battery died. The first one was fixed by reconnecting the unatached wire but this time, the problem is a bit more serious. I suppose that 'cause the wires are intact.

So, has anyone found a battery replacement for the M6SL?
'Cause I can't find a damn thing.

Help would be appreciated.

EDIT: Oh, the charge controller is broken. Is it possible to replace it?
Still interested about the battery.