A2159 820-01598-06, charging but not running from batt

[willumpie82]

Hi All,

I'm diagnosing a A2159 with the following issue
After waterdamage the device won't run from battery, when USB-C is connected it runs fine, battery seems to be charged, battery state is readout correctly, but when charger gets disconnected the machine shuts off.

I think it must have to do something with the circuit that combines the PPBUS_G3H and PPDCIN via the two diodes. In previous models this was done via a BAT30 SOT-323.

I tried to locate the PP3V3_G3H regulator but can't find anything on the board that I can identify as such

as many other people mentioned, unfortunately no schematics/brd available for this new device.

any clues welcome :-D

[willumpie82]

Re: A2159 820-01598-06, charging but not running from batt

reply to self,

I suspect the battery board to be toast, when I measure the pads with nothing connected I measure ~12v, when i connect it to the board it drops to about 3v

I found the input circuit... found also that when I apply 12v @5A to the capacitor near the batt flex (with no batt connected) it runs from my fake battery
(see my annotated image I uploaded)

[MobileXT]

Re: A2159 820-01598-06, charging but not running from batt

your battery is shot from the water damage

[igeektech]

Re: A2159 820-01598-06, charging but not running from batt

Did replacing the batt fix the issue?