How to turn off the ringtone after charging the mobile phone?

If you need to turn off the prompt tone when the battery is fully charged, you can go to Settings-Applications and Permissions-Application Management-Click on the dot in the upper right corner-Display system program-System interface-Notification-Full battery-Sound-Select Mute.

If you need to turn off the power-on tone, you can set the phone to mute or vibrate mode.