5+6. Leaving the case on while charging+wrong charger
Some people just let the case on the phone when it’s charged. This will make your handset become too hot. And even in some cases, your phone will explode. So just take your fancy case off while charging. One more factor harms the battery is a wrong charger. Apple charger is designed to shut down the power when the phone is fully charged. But this function is not on those unauthorized third-party USB cords. These devices can cause you phone damaged.
