Charging correctly will make your iPhone battery last longer

Readers of the Washington Post asked tech columnist Geoffrey A. Fowler what they can do to extend the life of rechargeable battery products like Apple’s iconic iPhone.

Apple battery level icon

Geoffrey A. Fowler for the Washington Post:

It’s a dark aspect of gadget ownership – lithium batteries are picky. They all gradually lose capacity, which means it’s only a matter of time before your device doesn’t have enough power to be useful. But how long? Part of this is built into the design, but how we charge and use batteries can also make a difference.

For example, leaving your device plugged in most of the time can help you avoid the stress of being caught with a dead battery. But it could also put stress on the battery.

So what can we do to extend the life of the batteries? I called two scientists who study lithium batteries, Gregory A. Keoleian of the University of Michigan and Michael G. Pecht of the University of Maryland. “The key factors affecting degradation are temperature, state of charge and rate of charge,” says Keoleian.

They advised us to always follow the specific advice of the producers.

MacDailyNews takes: Here’s what Apple says about optimizing iPhone battery power, verbatim:

iPhone has a setting that helps slow the aging rate of the battery by reducing the time spent on full charge. This setting uses machine learning to understand your daily charging routine, so it waits to complete the charging over 80% until you need it.

  1. Go to Settings > Batterythen tap Battery status.
  2. Turn on Optimized battery charging.

There is no step 3.

Proper charging will make your iPhone battery last longer
Source: Apple Inc.

Your Apple Li-Ion battery uses fast charging to quickly reach 80% of its capacity, then switch to slower maintenance charging. The amount of time it takes to reach that first 80% varies depending on your settings and the device you’re charging. The software can limit charging beyond 80% when the recommended battery temperatures are exceeded. This combined process not only allows you to get around earlier, but also extends battery life.

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