Just as you wouldn’t leave your pooch in a car parked in the sun, you should be careful with your iPhone. It’s rated for use at up to 95℉ (35℃) and can be stored at up to 113℉ (45℃), but temperatures inside a parked car on a sunny day can exceed 130℉ (55℃) within 30–60 minutes. That can both temporarily disable your iPhone and damage the battery more permanently. If your iPhone gets too hot, it warns you, “iPhone needs to cool down before you can use it.” It also stops charging, dims or turns off the display, puts its radios in a low-power state and disables the camera flash, although audible turn-by-turn directions will continue. Turn it off and let it chill out for a while.
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