The current iPhones have some charging problems – this is fixed in the 12.1 version of iOS.
The upcoming iOS update fixes a behavior that some iPhones have shown: they don’t charge when they are switched off. So if you wanted to charge your switched off smartphone, you had no success and found your battery empty even after hours.
Apple has already fixed this in the beta of iOS 12.1, so the bug should be solved directly. We will keep you informed when the update is available for download.
