Originally Posted by MrBlack
I would discourage against putting them in a refridgerator as going from very cold to instantly warm and back as it can create condensation that could damge the internal PC board.
Mildly cool is good but a refridgerator may be a little much.
I've seen this "concern" voiced before and it is certainly legitimate.
However, in the summer, in humid climates, the exact same thing happens when going from the airconditioned house to the 90% humid/ 95 degree outdoors. I've had water literally dripping off my RC cars in that condition...enough to make me decide to let them sit awhile for fear of shorting out the ESC.
I would expect the same restriction or warning to be placed on the Lipo batteries.
I don't get anywhere near that kind of condensation when taking the batteries out of the fridge and I always let them warmup before using them.
There is a trick used in other fields to protect against this condensation. The item is placed in a sealed baggy after it cools and remains there until it warms up. Because it was placed in the baggy with dry, cold air, condensation doesn't occur during warmup.
I wouldn't recommend refrigerating the batteries on a casual basis....only for long term. It takes planning to have the batteries ready when you need them.
Funny anecdote relative to electronics and condensation. At the place I used to work they gave us all laptops. Unfortunately, the place wasn't very secure so we were advised to take them home with us at night vs. leaving them locked in their stations. Often they would remain in the car overnight...locked in the trunk. Remember plugging in my laptop one cold morning and hearing all kinds of scratchy pops and crackles coming out of it. At first I absentmindedly thought it was the speakers being affected by the cold. Then it dawned on me. The thing was full of condensation. Luckily I didn't fry something before I figured it out. Memo to the office: Do not leave your laptop in the car overnight in cold weather.