Storing Lipos cold?
 

Like 40sF* cold in my garage? Is that okay? What about charging cold? What if it got down to 30sF* in either situation?

You will lose lots of performance and capacity until you warm them up. I don't remember what I heard about long term storage, but if you are using the packs storing them inside is a must.

You could also ruin your packs because when the packs are cold the internal resistance is higher and if you push them too hard too fast they will puff/explode/burst into flames.

Yup, what ML said.

For storing- 40 is probably about the minimum.

For charging and running, 65+.

Optimum run temps seem to be between 90 and 110 -and your truck will go "like a stabbed rat".

Lipos no likey cold!

Lipo's don't like cold, period. Keep them inside where its at least 60+ degrees

Little bit of this action happens if the lipo's get too cold:

http://i3.photobucket.com/albums/y64...pire04/005.jpg

I have 2 hyperion g3 lipos that have been sitting in my car in -20 degree weather for the last few days and are still fine. Just warm them before running.

You Cat's are farking crazy

I think the batteries are good at cold temps, they just can't be charged or discharged at low temps. I faintly remember someone saying they saw that some racers keep their lipos in the freezer and it makes them better...

It's all a matter of internal resistance. Cold Temps raise the IR.

I store mine in a drawer in the shop. It gets pretty cold, but I just sit them in front of the elctric fire and let them get to 90f or so. Lipos do not like to be pushed when cold. Even after a warm up I generally take it easy for the 1st 5 mins or so when I run.

Storing them cold probably just reduces any chemical reaction (self-discharge, cell corrosion if at ~4.2v, etc). But to charge/discharge them, I agree with everyone else; get them warm. I store my packs in a metal drawer lined with cardboard. The metal is in case something happens and can handle a fire without melting. The cardboard is just an insulator in case there is an exposed wire I didn't catch.

nope, we just understand the chemistry

like this. spot on. They can get cold when stored, but can't get cold then used.

On second thought, freeze may be right. We're a bunch of Crazy cats around here. BRUSHLESS CRAZY!! muah hahahahah

I was referring to Unsullied

I'd do it too, that's why I joined the crazy cats. Nothing wrong with what he does.

Can you imgine how cold the cargo holds are on the airplanes that get our batteries stateside? Pretty frickin cold at altitude. No worries.

But nothing bad can be said about being extra cautious, so to each their own.

So the consensus seems to be that storing the lipos cold is fine just not charging or discharging fresh from the cold. Running them in 25F* weather is fine as long as they stay warm from the heat inside my house or my Ranger, right? I think I need to run my truck in the snow!

You will want to consider wrapping your lipos in a rag or a sock or something if it's really cold or if you have long runtimes. Just check temps underneath every so often. There's a slim chance they could get hot if they are pushed hard.

You goal is to keep them avove ~60f, ideally warmer then that.