Moto G 2015 Battery LED Stuck On?

[AC Question]

Hi. My girlfriend has had her Moto G 2015 (3rd gen) for almost a year now. The phone has been advertised as waterproof, which she has taken advantage of. She was using it in the pool last week to take pictures. It wasn't under for very long at all, and wasn't very deep at all. Ever since then, the battery led in the top speaker grill has been constantly on. Power on/off doesnt fix, and neither does clearing the cache partition. It's only supposed to be on when the battery is really low. Any ideas to fix?