[JeffEmbracedDC]

Yeah, I've made a few similar to that myself (of aluminum) I guess I'd ideally have something that surrounds the entire battery (bottom, and all four sides) and ideally a non-conductive material. Basically the delrin or other plastic trays are perfect. The aluminum definitely works... but the more wrapped around and the less conductive the better..

but definitely thank you for the tip. I like your design. I just may end up using it. Thanks!