#Screen takes 60+ % of battry😡

I think I am the only one whose half, more than half battery drains by #screen only😐😐 I have googled many times and applied all those tips but didnt work :( I use my phone in 0 brightness and the screen timeout is also 5 sec and even in reading mode. But battry drains so fast, It decreases #2% of charge in #3 minutes. Please help me to fix this.. PH Model: I9505 XXUGNH6!
-Thank you.

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