Samsung Galaxy S6 Edge SM-G925F charging problems

[MrWebLover]

Hi at all,
i have a problem with an S6 Edge G925F phone.
The phone did not charge the batterie. Says always 0%
It works fully on connected power suply.

Short description. The Phone falls in water and was aprox 5s
under water a few weeks ago.
Yesterday i opend it and check the motherboard.
There was water kristals around the batterie connector and
on the other side (same place) at some electronic.

I cleand that and do a complete washing in isoprop alcohol
with ultrasonic bath.

The phone works complete, but not load the batterie.
I loaded the batterie external, so it is fully charfed.
But in the phone, the phone say always batterie is 0%.

Is inside the accu an gas gauge chip ?

Has anybody the schematics of that phone or of the
charging part .... or some other idea/help for that
problem ?

P.S.: Sorry for my bad english...

Best regards,
MrWebLover