Dude I think your headphones are defective. I’ve never noticed my AirPods get anything more than vaguely warm.
1 point
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I know the left one’s battery runs down about twice as fast as the right one, so yeah they’re probably not in ideal condition.
When using them indoors, they only get mildly warm, nothing to really worry about. But you gotta keep in mind, some folks like to go out jogging with them in their ears.
They’ll get that much hotter when outdoors on a hot summer day, and electronics really don’t like sweat…