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How to Check iPhone Battery Health and When to Replace It

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11 mins
How To
  • Your iPhone's battery might be silently waving the white flag.
  • Is your phone slowing down, or is it something more sinister?
  • The fix for your iPhone's battery woes might be simpler than you think.

Even the best batteries have a lifespan.

After a few years of use, you may notice your iPhone struggling to keep up—requiring more frequent charging, slowing down, or even shutting off unexpectedly. So, how do you know when it's time to replace your iPhone battery? Here’s everything you need to know.

The Science Behind Battery Degradation

All iPhones use lithium-ion batteries, known for their efficiency and lightweight design. However, as these batteries age, they gradually lose their ability to hold a charge. This degradation is a natural process driven by chemical reactions within the battery. Over time, these reactions reduce the battery's maximum capacity, meaning it can't store as much energy as it once did. This isn’t unique to iPhones—it happens with all lithium-ion batteries.

Apple’s introduction of battery health monitoring tools in iOS 11.3 was a game-changer. This feature allows you to keep tabs on your battery's condition, so you know when it might be time for a replacement.

When to Replace Your iPhone Battery

Apple suggests considering a battery replacement when your battery's maximum capacity drops below 80%. Here’s a quick guide to help you decide:

  1. Battery Health Below 80%: If your battery health drops below this threshold, your iPhone may not last through the day without charging. Frequent recharges or a battery that drains rapidly even when fully charged are signs that it’s time to consider a replacement.
  2. Unexpected Shutdowns: iPhones are designed to shut down automatically if the battery cannot deliver peak power, a common issue in aging batteries. If you experience this, your phone might display a message indicating that performance management has been applied to prevent further unexpected shutdowns.
  3. Reduced Performance: Slower app load times, lower speaker volume, and overall sluggishness can all be symptoms of a degrading battery. While these issues could be due to other factors, if they coincide with poor battery health, it's likely time for a new battery.
Apple introduced Battery Health metrics with iOS 11.3, so now you can easily check and monitor your battery health at any time.Photo via Apple Inc. // Apple introduced Battery Health metrics with iOS 11.3, so now you can easily check and monitor your battery health at any time.

How to Check Your iPhone Battery Health

Checking your battery health is simple and takes just a few moments:

  1. Open Settings: Start by opening the Settings app on your iPhone.
  2. Tap Battery: Scroll down and tap on the "Battery" option.
  3. Select Battery Health & Charging: Here, you'll find crucial information about your battery, including its maximum capacity and whether performance management features have been applied.

Pro Tip: If your iPhone is relatively new, say an iPhone 14, and you see a maximum capacity of 95% or lower, it might be a good idea to monitor it closely. Batteries can sometimes deplete faster than expected, particularly with heavy use.

The Cost of Replacement

Replacing an iPhone battery is more affordable than many think. Depending on your model, a new battery can cost as little as $70. While there are DIY kits available, it's often worth the peace of mind to have an expert handle it—especially considering the risks of damaging your device.

Extend Your Battery's Lifespan

While you can’t stop battery aging, there are quite a few ways to slow it down:

  1. Avoid Extreme Temperatures: Keep your iPhone away from extreme heat or cold, as both can accelerate battery degradation.
  2. Use Optimized Battery Charging: Since iOS 13, Apple has included a feature called Optimized Battery Charging, which reduces the time your iPhone spends fully charged, helping to extend battery lifespan.
  3. So Much More: For the full comprehensive list on how to extend your iPhones battery life, be sure to check out our handy guide for keeping your iPhone alive longer.

Final Thoughts

In the end, an iPhone’s battery is its lifeblood. Regularly checking its health and knowing when to replace it can save you from the frustration of a failing phone. And remember, while a battery replacement might seem like an inconvenience, it’s a small price to pay for keeping your iPhone running smoothly.

As one Apple user put it, "Replacing my battery gave my old iPhone a new lease on life. It was worth every penny."

So, if your iPhone's battery is showing signs of age, don't wait until it's too late. A quick check and a timely replacement can keep your device performing at its best.

Recommended by the editors:

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