How To Know If My Battery Is Bad Iphone. If you are running iOS 113 or later then its quite easy to find out how your battery is coping with the demands being placed on it. This equates to roughly 14 to 18 months of optimal battery usage after which things can start to change.
Battery in the Red When your iPhones battery is dead the phones screen is black and you cannot access any of the phones functions. While a calibration problem could be to blame which is easy to resolve with a full charge and a soft reset shutting down all of a sudden is more likely due to a worn battery. Test the battery with it and if defective schedule an appointment at an Apple store for possible replacement.
Contrary to older iPhone designs pressing the side button will not restart your iPhone X nor will it fix battery issues.
What you should do instead is open settings head to General scroll to the bottom and select Shut Down. If this doesnt fix iPhone battery problems keep reading. How to check your iPhones battery usage. If you are running iOS 113 or later then its quite easy to find out how your battery is coping with the demands being placed on it.
