You’re charging to 100%
If some one feel sweating when your battery drops below 90%, you need to be cool. Maintaining a full charge is not the most efficient way to keep your phone battery strong. In fact, experts suggest letting your phone coast through the day between 30 and 80 percent full. That’s where it’s most comfortable, and will run most efficiently. So stop juicing it overnight, and instead go for shorter and more frequent bursts throughout the day.