So after a while i got to this again. Just writing to conclude this story

I measured SDA / SCL on battery connector when plugged it showed nothing. I found fitting used battery on local site simmilar to ebay so i just bought it. It came in about two weeks i plugged it in and it is working without and issue.
So the battery was dead possibly from faulty connector which wasnt making proper contact to GND or some ESD event as mentioned above.
I was using notebook...
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