iOS includes several useful tools for displaying how much battery life your iPhone has left, as well as which apps are consuming the most of your battery. However, none of these tools actually tell you anything about your battery’s long-term health, which is just as important.
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Battery Health vs. Battery Life
Battery health is different than battery life. Battery life determines how long your battery lasts on a single charge, but your battery health determines how much your battery life diminishes over time. After a year, your battery life won’t be as long as when the phone was new, and it will continue to degrade as the years go by.
if you’ve ever had to constantly recharge your older phone because the battery would only last a couple hours, then you know how annoying this is. Compounding the problem is that most mobile phones don’t have a user-accessible battery that can be swapped out with a new, fresh battery.
Fortunately, there are two excellent metrics you can check to get a big picture view of your battery’s health. The first is the remaining maximum capacity (the total charge your battery can hold). The second is the total number of charge cycles the battery has gone through.
Real world use always chips away at the total capacity over time, but a healthy battery will have only a few percent shaved off its original capacity.
Furthermore, lithium ion batteries (those found in pretty much every smartphone) degrade a tiny bit with each charge cycle. Apple says they design their iPhone batteries so that the battery should retain roughly 80% of it’s capacity after 500 charges.Battery health data is not available in the iOS settings, so you have to take some extra measures to get this information, and there are several ways to do it.
Ask Apple Support
In years past, if you wanted to know the battery health status of your iPhone, you’d have to take it to an Apple Store and let them run a diagnostic test. However, this kind of thing can be done remotely, too. Thus, it’s perhaps the best way to get this kind of info.
There are several ways you can get a hold of Apple support. You can visit their support website and talk to someone on the phone or through chat, or you can do what I did and just tweet at them.
Basically, they’ll tell you to DM them and you’ll give them your iPhone’s serial number and iOS version. They’ll then approve you…
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