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How to check if you need to replace your iPhone battery

Does your iPhone randomly shut down or slowed down drastically? Are you troubled with your iPhone’s inability to retain a charge that can last you a day? Well, it could be due to the defective battery. Apple lets you easily check if you need to replace the battery in your iPhone.

To be sure, I’ll show you how to check your iPhone’s battery capacity and performance to see whether replacing your battery is the solution.

How does your iPhone battery work

All rechargeable batteries have limited lifespans and will eventually experience a decline over time. Your iPhone’s battery health is linked to its chemical age, depending on factors like charge cycles and how you use and care for it.

Apple estimates that it would take 500 cycles before iPhone batteries start to degrade. They are only expected to retain 80% of their original capacity. 

iPhone does not explicitly show users their iPhone’s cycle count. Fortunately, we have a hack allowing you to easily see your iPhone’s current cycle count.

How to check your iPhone’s battery health

Aside from checking your iPhone’s battery cycle count, you can quickly check your iPhone’s battery health. Just go to Settings → Battery → Battery Health & Charging → Check Maximum Capacity.

Check battery health on your iPhone

NoteThis is only available for iPhone 6 and newer, running iOS 11.3 and later.

If your iPhone has reached or is about to reach 500 charge cycles, you’ll find a notice here saying, “Your battery’s health is significantly degraded,” if your iPhone’s battery needs replacing.

Alternatively, you can open Apple’s Support app → Tap Repairs & Physical Damage → Battery Service. You’ll be offered a quick check of your battery performance. Now, tap Check Now.

Open Apple’s Support app to check Battery health

In the next section, you’ll also find relevant information about your iPhone’s battery health, including Maximum Capacity, Peak Performance Capability, and Optimized Battery Charging.

What does the battery usage information mean on iPhone?

When you go to Settings → Battery, you’ll find different graphs. These data give you information about your battery usage and activity for the last 24 hours and reflect information up to the last 10 days.

Some of the information you will see here include:

  • Last Charged to XX%
  • Battery Level graph in Last 24 Hours
  • Battery Usage graph in Last 10 Days
  • Activity graph
  • Screen On and Screen Off
  • Battery usage by App
  • Activity by App

Note: Sometimes, you might see insights into usage patterns and conditions that cause your device to consume energy. There may also be suggestions to help lower your energy consumption.

This will give you insights into what may be causing the quick battery drain. You can also read our comprehensive list of tips, tweaks, and solutions to help improve your iPhone’s battery life.

When to get an iPhone battery replacement, and how much does it cost?

Having your iPhone’s battery’s Maximum Capacity drop to 80% doesn’t mean that it needs replacing immediately. It still depends largely on your use. Most iPhones with 70-80% battery health can still last you a day if you don’t use them for online streaming or playing games.

Aside from your phone telling you that it might be best to have your battery replaced, it might be time to replace your iPhone’s battery if:

  • You have to charge your phone every few hours
  • Your iPhone only works while plugged in
  • If your phone suddenly shuts down even if its battery is at 10% or higher
  • Your battery outgrew your iPhone

If the battery has to be changed because of “normal usage,” Apple’s warranty does not cover it. However, if you have AppleCare+, you may replace your battery for free as long as it still retains 80% or less of its initial charge.

Depending on the method of iPhone battery replacement you prefer and what model you have, replacing an iPhone battery can cost you from $49 to $99.

How to replace the battery in iPhone

Once you’ve decided, the next step to replacing your iPhone battery is to choose how you’ll do it. Here are your options:

1. Through Apple

Replace the battery in iPhone Through Apple

The ideal way to replace your iPhone’s battery is to have Apple do it themselves. Before you even shell out a hefty amount for a replacement battery, it’s best to check if your iPhone is still covered under warranty. To do this, check your service and support coverage by entering your serial number.

You can begin by going to Apple Support and finding a local Apple service provider near you. Once scheduled, you can drop by the service provider. Depending on the case, they might suggest sending it to the Apple Repair Center—the downside is that it may take some time before your device gets returned to you.

2. DIY

If you’ve got the courage and the know-how to do it yourself, you can buy a DIY kit, including the battery and all the tools you need. iFixit sells these kits and also provides you with comprehensive video repair guides.

Since you’re considering DIYing, why not try Apple’s Self Service Repair Program instead? Apple now gives its users access to tools, manuals, and genuine parts, similar to those accessible to certified technicians at Genius Bars.

3. Through third-party vendors

If you neither have the confidence, skill, and time to do it nor have the budget and waiting time to consider going to a certified Apple service provider, a local repair shop is another option.

However, it’s essential to check reviews and feedback from previous transactions since the skill and quality of work vary significantly from provider to provider.

Should you just get a new iPhone altogether?

In most cases, getting your iPhone repaired is a better—and cheaper—option than getting a new iPhone.

However, if your device has been with you for more than five years and several issues are beginning to surface, a battery replacement can give a little boost to your iPhone’s performance, but it will further deteriorate. In this case, it might be better to get an upgrade instead. 

Is 70 percent battery health good for iPhone?

It all depends on usage. While Apple indicates the amount of charge an iPhone can hold will begin to drop at 80% battery health, a 70% battery health may still give you a full charge throughout the day without heavy usage, including video streaming and playing video games.

How long do iPhone batteries last?

iPhone batteries are designed to retain up to 80% of their capacity compared to when they were new at 500 complete battery cycles or full charges. Reaching 500 full charges varies on individual usage patterns but usually takes two years.

Why is my iPhone battery draining so fast all of a sudden?

Issues can be software-related, including glitches in a software update, brightness settings, use of power-intensive apps, location services, and more. It may also be hardware-related, like a degraded battery.

Wrapping up…

iPhones are versatile devices. This is why it’s frustrating when they drain too fast and can no longer hold a charge. Replacing your iPhone’s battery may just solve your iPhone battery drain worries.

Would you go to Apple or your local repair shop, or are you game to DIY if you’re considering replacing yours? Share your thoughts below!

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  • Jignesh

    Jignesh Padhiyar is the co-founder of, who has a keen eye for news, rumors, and all the unusual stuff around Apple products. During his tight schedule, Jignesh finds some moments of respite to share side-splitting content on social media.

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