Stop Backup
The mobile battery performs quickly and the backup takes 75% from using the battery
iOS 11.0.3
The mobile battery performs quickly and the backup takes 75% from using the battery
iOS 11.0.3
If while you're performing a backup, the battery is drained by 75% as you stated, you should take the device in to your local Apple Store, and make an appointment with the Genius Bar folks.
Stop Backup