How to improve Samsung Galaxy On7 Pro battery life?

My new samsung galaxy pn 7 pro battery backup is not so good..good..its give 3000mh battery lilife...but i dont think so that its gives 3000mh power

...p...please solve problem 

Put the brightness level to least possible and turn off all wireless connections (Bluetooth, Wi-Fi, Mobile Data, GPS). Keep in mind that battery life depends on your usage. If you play a lot of games, watch videos, or listen to music a lot then it's normal that battery drains fast.

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