Ursprünglicher Beitrag von: krisfuqua ,
AS Aiden Baker suggested, replace the battery. The problem you describe points to a battery failure. That and if it is swollen in the way you described there is a high chance it is damaged. This could be from the liquid or a crazy coincidence. If there replacement batter results in the same problem and you have already swapped out the charging port then it means a competent has shorted out on the board. It "could" still be fixed but you will need a shop with micro soldering equipment and schematic knowledge to test and replace.