BrianG - This one's for you

[bruce750i]

I think they use something like this in those electric coolers for autos. Mine came with a 120v to 12vdc 5amp converter cable (PSU). I ripped it all out of the cooler years ago. On 7.2v it makes 38f at 2.5a.

Sub-zero temperatures can't be good for your magnets. IMO

[MetalMan]

Originally Posted by bruce750i

Sub-zero temperatures can't be good for your magnets. IMO

That is a valid point, because they will become more fragile at very low temperatures. It's already possible to shatter a magnet at 100+ deg. F.