Guide: Restore and maintain the battery life of your OP15
What you see in these two screenshots is a typical day for my beloved OnePlus 15, which I've had since the beginning of May. After almost four months of use, its battery health is still at 100%, and the battery life is excellent. In this short guide or tutorial, I'm going to try to explain why your battery doesn't last as long, and what to do to prevent it.
First scenario: your battery doesn't last that long.
First things first: stay calm. Your phone is probably only a few months old, and I know you're already thinking about replacing its battery. First, check that no app or service is draining the battery in the background or has frozen. If you've already ruled that out, you need to understand that lithium batteries, being pure chemistry, they function according to how you treat them. This is the first thing you need to do to restore their functionality:
1.Charge your phone to 100%
2.Use it normally until it's completely discharged. It won't work if it reaches 1%; the phone should shut down due to lack of charge.
3.Charge it to 100%. Turn it on, but you can't use it while it's charging.
4.Wait until the full charge notification appears.
Congratulations, you've just calibrated your battery! From now on, you should notice that its battery life increases.
Second scenario: You want to take the best possible care of your battery
Gentlemen (and perhaps some ladies), turn off charging until 80%. All you're doing is using less battery throughout the day, reinforcing the false impression that your battery doesn't last. They recently compared several batteries through many charge and discharge cycles, I can't remember exactly, but they spent monts forcing them, some from 0 to 80% and others from 0 to 100%. The result? Between 2% and 5% difference between batteries charged to 80% and those charged to 100%. What's the point of giving up using the full potential of our phones for a measly 3% battery health?
If you really want to take care of your battery, don't let it drop below 20%, or at most 15%, as normal. More importantly, don't charge your phone in short bursts. Don't plug it in for 10 minutes, then another 20 minutes later. Obviously, it's normal if you're in a hurry one day and you charge it for 10 minutes at home and 20 minutes in the car, that's fine too, there's no need to obsess over it. The problem is doing those micro-charges Repeatedly, day after day. They are those things we do perhaps without paying attention, are what throw off the battery calibration and then make it last less time. Simply by like that, you'll protect your battery.
As a friendly piece of advice, enjoy your phone and don't obsess over percentages; with just a little care, your phone and battery can last for years.