Here’s a quick tip for getting a smartphone or tablet that’s running low on juice up to full power as fast as possible. Switch the device to airplane mode while you’re charging. This shuts off the WiFi connection and means your phone won’t use any power updating apps or receiving notification.
Airplane mode is usually found under Settings and is usually under Network connections. Don’t forget to shut airplane mode off when the phone is charged. Otherwise, you won’t be able to connect to the Internet.