Compatible with iOS 10
Telolet Charging Alternativ BeepBeep for iOS 10. lets you to completely customize what happens when you plug in your device.
Configure options from Settings.
create a custom sound file, replace the extension of your audio file by '.caf'. example: 'myTeloletSound.mp3' to 'myTeloletSound.caf'.
put your sound file in the following folder: /Library/Application Support/Telolet/Sounds/