The ipad can not be charged in cold weather, which may be due to the low temperature protection set by the battery.
The iPad's battery has a cryogenic protection to prevent internal short circuits, so the ipad can't be charged in cold weather. iPad low temperature protection is about 10℃. If you can't charge it, warm it up and try again.
The so-called low temperature protection is that in the case of too low temperature, the metal lithium in the battery will produce deposition phenomenon, and no longer react chemically with the substance, resulting in the internal short circuit of the battery. Because the best temperature for chemical reaction of lithium battery when charging is above 10 ° C, it is best to charge in a warm room, otherwise it is easy to cause damage to the battery.