1, under normal circumstances because the battery overheating triggered the protection mechanism, the iPhone will heat up when charging, in order to extend the service life of the battery, if the battery is too hot software may limit the charge after the power reaches 80%, charge again when the temperature drops, you need to move the phone and charger to a cooler location, or unplug the power to wait for natural cooling after charging. Therefore, usually do not charge while turning on the hot spot or charging while playing games, or even the environment is too hot, which may lead to the battery of the Apple phone can not be charged continuously.
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2, you can use the phone to automatically shut down the battery, and then charge, do not use the phone during the whole process, until the battery is turned on after full power, the phone will calibrate the battery to solve this problem.