If you need to turn off the full charge tone, you can go to Settings-Applications and Permissions-Application Management-Click on the top right corner-Display System Programs-System Interface-Notification-Battery Full Charge-Voice-Select Mute. If you don't have this option, you need to mute it.
For more personal questions, please go to official website /vivo Mall APP-My-Online Customer Service or vivo official website Webpage Edition-Slide to the End-Online Customer Service, manual customer service and consultation.