Why does my HTC One M7 heat up to 65 degrees C (145 F) when in use for more than 20 minutes?

Paul Angus1

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Jul 15, 2015
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With just a small handful of apps open the phone gets far too hot to even touch. It's not under warranty as I bought it on eBay pre-rooted, even though the seller did say it was un-rooted. Are there any apps I can use to stop the phone overheating so much? I've got Power Clean but it doesn't do much - even with just the background processes and the Alarm Clock app running, it still overheats to 65 C in a matter of minutes.

It's also got terrible battery life, which I believe is linked to the overheating problem. Anything I can do to improve that too?