trups0515 , via OnePlus 9 , Jun 22, 2021 : Dear sir/ madam, I purchased OnePlus 9 5G last week and started using from 20/JUN/2021, it has been observed that battery is draining very fast which was not a case in my earlier used OnePlus 6 phone. Request you to please resolve the issue of battery draining. I have unable notifications, battey optimization is selected but still facing the issue. Very disappointed with the performance of battery in new hanset. Appreciate your response on smae.