Did you not know that your batteries would perform better if they are cold?

Okay, everybody knows that heat effects electrical and electronic devices such as CPU and RAM, but what about the battery? Did you know that if a battery is heated too much it would not perform better? (Yes, everybody knew that heated battery can make your device catch fire), but was it kind of - yeh everybody knows it - type of idea. Well, someone just filed a patent around it.

So what about heat sink for battery or the cooling fans?