My first smartphone was a Samsung Galaxy S1. It had an easilly swappable battery which was great because time between recharges was much shorter in those days so I had 2, one in the phone and one in the charger.
But once I got the phone wet just using it outside in the rain. After that it refused to charge for several days until it dried out.
More recently I've dropped my phone in water and it was perfecty fine with no drying time at all...