When you’re in a place with a Wi-Fi connection, your phone automatically connects to it even if you’re not using your phone. But often forgetting this type of active connection when the device is not in use can quickly drain the battery.
By default, Android doesn’t have an effective mechanism to automatically disable Wi-Fi, this type of connection is active even though it’s not connected to any network, meaning your phone’s battery power is meaninglessly lost.Here’s how to turn off Android Wi-Fi Automatically in some situations.
As mentioned above, the task of turning off Wi-Fi automatically does not come by default in the system. For this you will need a free app available on Google Play called “Better Wifi On / Off”.
When you first open the program, click “Reject” and then click the icon in the image below to access your options;
Scroll down the options menu and enable Expert Mode;
At this point, you will return to the main screen of the application. Therefore, touch the icon again to enter the Program Options and check the “Stop when screen is off” option.