Usually we encase our battery in lexan (polycarbonate). This year to hold the lexan in place, we thought about drilling screws and a bracket inside the case to hold it there, but some of our mentors expressed concern over metal touching the battery. Apparently in past games, metal wasn’t allowed to be touching the batter. After reading the battery section of the rule book this year, I didn’t see any part in there that said we weren’t allowed to have metal touching the metal. We’ve figured out a way to hold the lexan case in place without the battery touching metal, but I’m still wondering if metal is allowed to the battery. If so, could someone point me to where it says that in the rule book? Thanks 
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There’s no requirement in the game manual on the material that the battery is mounted around.
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There is a practical consideration that you don’t want the metal damaging the battery, say by a sharp screw point. But otherwise, as long as the terminals aren’t bridged you’re fine with metal.
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The battery holder in the KOP chassis is aluminum.
I think what your mentors are getting at is there shouldn’t be any bolt or screw heads the battery could rub on or impact from a hard it. Regardless, there is no official rule limiting materials for the battery containment.
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we’ve always had a full metal battery box, either riveted or welded
Thank you!
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