You are going about it the wrong way… it would be much better to charge to 100% and drop to 40/50%. Running the battery below 20% is causing your battery to degrade almost as quickly as mine.
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iPhone 13 Pro Max My iPhone 13 pro max battery capacity has went from 99% to 94% in a month
- Thread starter Jacoblee23
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It’s the NASA cycling approach with other scientific research supporting it. Working great for my 2.5yo XR on a custom optimization.
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Interesting. I was lead to believe the opposite was true. Only anecdotal evidence to prove my point, notwithstanding myself, unfortunately as I wreck my battery by hitting 100% then <5% on a near daily basis.
Yup, unfortunately battery care topics tend to be as bad as talking politics - conspiracy theories vs science, who’s to say which is right.
IMHO, you guys unfortunately got stuck with the series that Apple cheaped-out on batts (article linked above).
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I think we can agree that the most damaging thing you can do to your battery capacity is to run it flat each day. There is enough anecdotal evidence on this forum to say that on the balance of probability. I reckon that hitting 100% max capacity is probably not ideal either but it doesn’t damage the battery anywhere nearly as bad as running it flat.
I don’t care about babying my battery too much though. The phone is a tool after all and it has to work around me rather than me working around it.
I’m a battery hobbyist, so have read through this, and other credible and corroborating research data. Looks like politics hasn’t changed.
We can look at the same 2 pieces of data (there’s more, of course) and still come to opposite conclusions. My read is that cycling off zero (to whatever % is convenient) is the least stressful for batts. However, a 2nd plug-in/day is inconvenient so I personally won’t go to zero, but my phone sees 8% way more than 80%.
IMHO, the keep-it-over-40% thing comes from infrequent use gadgets like a cameras. In longer-term storage a low low voltage Li-ion risks self-discharging below critical minimums - but that’s not a risk for daily use devices like phones.
‘The science’ actually indicates that 100% is the most significant stress factor, even over 120F heat. Apple’s ‘Optimization’ takes 3sec to flip on, while a ‘custom optimization’ takes ~10 $/min (smartplug + shortcut) - otherwise no difference day-to-day, just plug-in once/day and forget if you want. IME, that’s a pretty easy way to double life (I get/expect 6-7yrs service life).
That said, this is unpopular opinion, and most folks rather stick with conventional wisdom and the popular anecdotal info. But the ‘science’ and especially tools (iOS13 2yrs ago) are out there making it easy/painless… if done right.
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People stick to conventional wisdom when it’s convenient for them. A lot of users don’t use their iPhones for 6-7 years at a time. If someone wants to keep their iPhone as long as possible then they have to follow a regimen which includes sticking to the 40/80 rule and avoiding high wattage chargers whenever possible like you say. How they go about doing that is up to the individual user. But calling anyone advising the other half of the users to use their iPhones as they please and just have the battery replaced when needed as conspiracy theorists doesn’t help anyone. And putting the word science in quotes doesn’t automatically add credence to an argument.
How can I check my battery life this way? like day after day result can you please tell ME?
If you have a Mac computer, use the app called Coconut Battery.
The battery health statistic varies from battery to battery because of the variances in the batteries themselves. It's also not linear. You can drop a few points in a week or two then remain on a given percentage point for 6+ months. As stated above it goes up and down. Different applications record it differently as well (cocoanut vs iOS). People engage in pedantic charging routines with wildly different results from user to user. (40-48, bla bla bla)
Since it's really not reliably predictable or meaningful, it becomes a completely useless metric.
So what does Apple do?? They remove the battery charge % on newer phones which was very consistent, reliable and informative and add this useless piece of information so people can fret, worry and obsess over a number that no one can really confirm.
The most humane thing Apple could do for it's customers is just remove it!!!
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I received my second iPhone 13 Pro Max this time and graphite with a 512 GB memory capacity it arrived on January 17. I now saw it dropped down to 99% just after two months and my original 13 promax that I got on launch day is still at 100%. I guess all batteries aren’t created equal so I’ll have to keep my eye on this one
Based on this chart, the increased SOC from 75-25 to 75-45 to 75-65 shows increased capacity retention. Hence, higher SOC isn’t more worse than lower SOC. CMIIW.