Of course if you could put even a little insulating foam around the
battery, like layers of 1/4" foam core, it would help, as would
putting your extra sweater or shirt on top of it. As Darryl's photos
show, it's best to keep the chilled beer in another location.



The thermal mass and the somewhat natural
insulation of an AGM battery means the internal temp will take a while
to soak down. I had plans of inserting a thermometer into an AGM
battery but never did that. If that is a real concern on say long cold
wave flights you need to look at solar panels, battery insulation, pre-
heating batteries or different battery technology.

Darryl