dfndr battery shows you much battery your screen is draining – it also allows you to adjust the amount that your screen drains your battery using filters.
To control your device’s screen usage, tap on “Screen Menu” tab in the bottom right corner of the app homescreen.
Here you can find a slider to adjust the brightness of your screen. Moving it to the left will drain your battery less, by making your screen less bright.
You can also choose one of the three economy filters: low, high and extreme. Using a filter lowers the number of pixels on your device’s screen, which will improve battery performance.