The weather of iPad mini2 is cold (7℃ to 1℃), so it can't be turned on. It can only be turned on by heating it with hot water for a while.

Because Apple's built-in power supply is lithium battery, and the lithium battery of iPad is self-protective, which is called low temperature protection.

It means that when the temperature is too low, lithium metal in the battery will precipitate and no longer react chemically with substances, thus causing short circuit inside the battery.

Therefore, in the cold winter and cold environment, the user's iPad will charge slowly and not charge.