Originally Posted by RainmanP
I made my battery box and tried it out yesterday. It seems to work quite well. The box is a 6x6x4 weather resistant electrical box. It is light but quite sturdy plastic with walls a little over 1/8" thick. The brand is Carlson (or Carlton). Hey, I may be a geek, but I have some pride!
Rainman,
This is the same box that I was considering. Turned out that it didn't fit on the rear rack well. But it's definately a good choice, light and waterproof and there may be additional room in there for extra supplies. You can get a waterproof boot to run the line through that cinches down on the box and prevents water and moisture from seeping in.
-V