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Question: How can I fix battery calibration on my iPhone?

I have an IPhone 6 Plus and I believe that it’s not reading the battery percentage right. It sometimes goes from 30 percent to 5 percent in minutes! So my ideal

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Mar 15, 2018 8:14 PM in response to Carlos.Baltazar In response to Carlos.Baltazar

How old is it? Do you know the number of cycles it's been through? If you have a Mac you can find this with coconutBattery.


The battery management system can only estimate the battery capacity. The model that it uses can be pretty good when a battery is new but it can break down as the battery gets older. Maybe something like a voltage drop and it realizes that there's less charge left than it previously calculated. If you see behavior like that it's often a sign that you might need a new battery.


There is one app that can be installed called Battery Life. It's in the App Store. It has a few ads but otherwise it's free. It doesn't report number of cycles, but it does have an estimate for how much of the original capacity is gone.

Mar 15, 2018 8:14 PM

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Mar 15, 2018 8:57 PM in response to Carlos.Baltazar In response to Carlos.Baltazar

Carlos.Baltazar wrote:


I don’t remember exactly how old it is. But I will install battery life. Thank you!


I don't really like Battery Life, but it's the only official app from the App Store that seems to state anything about battery capacity/wear.


I also mentioned coconutBattery. I prefer it because it gives more information, but you need access to a Mac. Even a friend's Mac. Here's the link:


https://www.coconut-flavour.com/coconutbattery/

Mar 15, 2018 8:57 PM

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Question: How can I fix battery calibration on my iPhone?