You shouldn't find yourself without battery because of Wi-Fi when you are not using it. With this app it's possible.
Ratings about WiFi Saver - Ultimate Manager
English | German and 2 more
Android 4.0, 4.1, 4.2, 4.3, 4.4, 5.0, 6.0
7 years and 4 months ago
Abo Hani OLD
Alternatives to WiFi Saver - Ultimate Manager
Get a complete program to solve all the problems you have the WiFi connection in Android
Search, manage and connect to all the WiFi networks that you have in your Android.
Now, with this app, you will have always WiFi free and you will be able to connect easily to them.
App with which you will be able to block the Wifi connection and keep it on even when the screen goes off.
Look for, scan and find all the public WiFi access points.