Use AirPods in environments where temperatures range from 0oC to 35oC (32oF to 95oF). A low or high temperature environment may cause the device to change its behavior to regulate its own temperature. Using AirPods in cold environments below their operating temperature range may temporarily shorten battery life and potentially cause the device to shut down. When the device is brought back to a higher temperature environment, the battery life will return to normal. Using AirPods in hot environments may permanently shorten battery life.
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Leave the device in the car during hot weather
Place the device in direct sunlight for long periods of time
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If the equipment overheats
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About safety standards
In the United States, it is UL 60950-1 and UL 62368-1
Canada is CSA C22.2 No. 60950-01 and CSA C22.2 No. 62368-1
In Europe they are EN 60950-1 and EN 62368-1
For Australia and New Zealand it is AS\/NZS 60950:1 and AS\/NZS 62368.1
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Charging hot Airpords does little harm to headphones. Although AirPods belong to wireless charging earphones, they need to be placed in the charging bin for continuous charging. The charging hot you say should refer to the earphones that suffer from the heat transmitted by the charging bin when they are charged in the charging bin. Then this heat is normal. It has no effect on the headset itself, because it is a simple energy loss, and the headset is composed of hard plastic, which has relatively high requirements for heat resistance and heat resistance.