Soo umm that can't be good...

[redshift]

Sucks to find out that way, but it's especially of concern for the pilots. The flyers seem to have many tricks to warm them up, even if it's just sticking it in your pocket for 15-20 minutes. The preheat temps don't need to be any higher than 100F, or 38C, and should not be allowed to drop much below about 80F, or 26C.

Put em in warm and rap on them, as long as the load is consistent they'll maintain their temps. IF they aren't in a case.
Keep in mind with non-hardcased packs you may be able to jump ~1000 mah for the same pack dimensions- that's a GOOD thing...

Good luck!

[redshift]

Originally Posted by redshift

The preheat temps don't need to be any higher than 100F, or 38C, and should not be allowed to drop much below about 80F, or 26C.

This was my recommendation for running temps, I guess I should have been clearer.

There is no consensus as of yet on what is too cold. That will vary brand to brand, and also vary according to C rating. It's pretty much wrap them in some sort of insulation, or take your chances.

It may be a good idea to over-gear some for cold weather running, that way the batts will likely generate more of their own heat. With so much tirespinning, the load is naturally lower, so that may also work against you.

On the flipside, if you're running in slop, then over-gearing may be bad, because loading up the wheels will then present more of a load than normal.

There's no simple set of rules for this stuff, other than personal intuition.

Just watching pack temps is your best bet, and I strongly advise against letting temps drop much below ROOM temp--- just so I can avoid the damn C vs F conversions....

Anyone else has more info, please chime in. I am NOT an authority on this stuff!

Just passing on the best info I can.

Hope maybe that helps!

[Slowkrawl]

I already geared up a little bit. I think if I wrap them up in a thin blanket of sorts they should be fine in -20. My other pack that didn't puff was still warm through the case 10 minutes after it happened, so hard to say how warm it was while outside.

-20 really isn't that much fun to drive in, but it's what I get to deal with for the next 3-4 months lol.