Yeah hot glue, I was thinking about it, but I decided caulking will be stronger. As for what Kink says, I hae no idea how to do any of that, so I'm just not gonna even bother. I really only need this to be able to keep out snow, and maybe a bit of water as the snow melts, and really, not much snow should even hit the battery pack. But, someone suggested using like a metal candy tin of some sort to contain the Battery compartment. It won't be perfect, but do you guys think it'll work?