Magne
since Lipos fly best when they are 120 degrees, I don't see why you need to have to cool them to ambient. I don't. I use 10s4p and 10s3p packs. Because they are the new ThunderPower 10c packs they go into the plane hot (sitting on the dash) but come out at around 110. I just put them right back on the charger.

-- Kyle