Water dripped from the ceiling(first time heavy rain in a new rental house) onto my bedside table, traveled to the end of the table where my phone was, and capillaried up into the battery compartment and into the battery. I inspected the inside of the compartment and only the battery got wet from what I could tell and the sticker on the battery was red. The phones sticker was fine and it turned on perfectly when plugged in without the battery.
I tore the sticker off the battery, blew some compressed air into the hole and some water was slowly bubbling out the top seams of the battery Did this until the battery stopped bubbling, tried it in the phone and it didn't work. Replaced the sticker with a white piece of paper and then it worked fine.