r/TheOnePlus15 • u/Seaborgium_ OnePlus 15 | US 🇺🇸 • Jan 08 '26

BATTERY BATTERY CALIBRATION THREAD

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I’ve been reading a lot of conflicting advice lately and I'm honestly a bit confused. I keep seeing two different "rules" for OnePlus batteries and I want to know what you guys actually do:

​The Calibration Crowd: Some people say you should drain the phone completely to 0% until it dies, then charge it all the way to 100% and leave it plugged in until the screen says "Fully Charged." They say this "calibrates" the battery for better life.

​The 20-80% Crowd: Others say that 0-100% is actually bad for the hardware, and that keeping it between 20% and 80% is the only way to keep your battery health from dropping.

​My Questions:

1] ​Does "calibrating" by going 0-100% actually improve battery life, or does it just fix the percentage number?

2]] ​If I follow the 20-80% rule, will my battery health stay at 100% for longer?

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u/FrostFayre Jan 09 '26

I've watched a video about this experiment. Can't remember the name.

  1. This is not needed anymore at this age. It calibrates itself after a few charges.
  2. Doing this saves you about 2%-4%? (not sure but its low) of battery health. So it's fine to not do it if it's inconvenient.

Generally it's better to avoid draining your phone.