I have a problem with the iPhone battery
I have a problem with the iPhone battery, there is a very noticeable and accelerated drop in the battery health level and there is heat when charging above the normal level
iPhone 11 Pro Max, iOS 14
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Heat when charging isn’t anything unusual.
As for battery drop, in Settings > Battery, you can check what apps were used at that time.
Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures
https://support.apple.com/en-us/HT201678
About the battery usage on your iPhone, iPad, and iPod touch