I think the battery (unvented

) is a sealed unit. So I don't think the water would impact it. Neither rice.
This is something I heard somewhere but it is nothing I would ever try myself.
Just buy a new one.
Please correct me if you know I'm mistaken. I'll delete the post
Don't want to spread that dangerous info
By the way. Light rain is cool. Torrential downpour? I wouldn't.
Electronics + water = not good