Sai1928 , via OnePlus 9 Pro , Sep 27, 2021 : Hi Team, I am purchasing new OnePlus 9 pro mobile. The mobile condition is very good but battery is drain very fast compare to my old OnePlus mobile. When my mobile keep a side battery drain is very quickly. And 10% of battery (Night to morning). Full charge screen on time is only comes 4 hours. Can you fix the issue as soon as possible.