Soo umm that can't be good...

[Slowkrawl]

Hmm, even one of those little packs you can stuff in your boot or whatever to keep your feet warm..But then if the thing ever tore, what kind of chemicals are we mixing? lol

[florianz]

sorry that that lipo puffed.

when it's cold outside, I take a plastic thermo bag (eg. for beer, sandwich), and some of those warming-pads. I put the lipos into the bag.

when I arrive at the spot (about 20 mins by car), all lipos are nicley warm, round about 30 deg. c. and the beer's warm, too...

very cold lipos have a high IR, that could possibly damage the esc, or even the lipo. and, you have not that much punch.

that bag worked well so far.