I've got an IP-68 (or whatever is waterproof) phone with a user-replaceable batter. It effectively has weather stripping along the battery door, and uses a scre

I've got an IP-68 (or whatever is waterproof) phone with a user-replaceable batter. It effectively has weather stripping along the battery door, and uses a screw to keep it tight. It's cheap, simple, and effective. (and no, it's not a smart phone)