battery dropping immediately after plugged in when it's close to 100%
when i plug my phone in when it's around 100% or basically just over 70% it drops the battery down like as soon as its plugged in it goes down in little steps (not like immediately 80% to 70% or smth its like 80-79-78 really fast) and its making me really mad. this happened after i put my plug into a power source at my cousin's house (her power plug source thingys are really damaged so maybe this was the problem) and i dont know why it happened and it completely broke my battery like that. ive been having battery problems for a little while now and im kinda desperate pls I JUST WANNA KNOW WHY IT HAPPENED IDK HOW TO FIX IT I CANT REPLACE MY BATTERY OR MY PHONE RN