Histórico de "Poor battery life due to water damage"

I've got a water damaged  Sony a2, that's the Japanese version of this phone. It's been water damaged due to use in the shower. The phone seems a bit buggy apart from short battery life but I think this may be due to a broken  power button. Is it worth trying to fix or will the water damage effect other areas?

Dispositivo:

Sony Xperia Z2

Status:

open