OP7 Battery Calibration - without root

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Senior Member
Nov 17, 2010
I have OnePlus 7, on Stock (No Root) I have recently replaced its battery, new battery is going good with decent backup, but with a trouble. It is (I suppose) wrongly calibrated.

It drains from 100% to 1% in 3-4 hours of regular use, and then remains on 1% for next approx 6+ hours, and eventually phone shuts down. I remember something similar happening with my (now vintage) nexus 4, after flashing ROM when battery wasn't sufficiently charged & then I have to re-calibrate it.

Trouble is my phone is not rooted, tried the guides given on reddit like charging it 100% while it was off, and the boot on & charge 100% further, then drain it shut down and charge again for 5 iterations & cache wipe after that. It is not working.

Any other way to calibrate battery please?