Your iPhone has been by your side through countless important moments. It holds irreplaceable memories for you, and helps you connect with your loved ones, near and far. But over time, you might start to notice that it no longer makes it through an entire day on a charge, or something much worse, your iPhone refuses to turn on. Out of the myriad reasons why your iPhone might not be functioning optimally, one of the major reasons could be a failing battery. The good news is, a new battery can breathe life into your device. In this article, we will guide you through everything you need to know about battery replacement such that you are fully aware of every aspect of the undertaking.

Understanding iPhone Battery Replacement

Signs Your iPhone Needs a New Battery

The most obvious sign is a sudden decline in battery life. If your iPhone used to have no issue keeping you going for an hour of average use, but now expires by lunchtime, it's a definite sign. The second sign is spontaneous shutdowns. Your phone will just switch off even if the battery gauge shows it still has some power in it. Plus, you might notice that your iPhone is charging a lot slower than before.

Checking your iPhone's battery health is pretty straightforward. Go to Settings > Battery > Battery Health & Charging. There, you'll see a Maximum Capacity percentage. When that percentage drops below 80%, your battery's performance has really suffered. Apple's take on this is when the maximum capacity falls below 80%, it's time to think about replacing the battery.

What does a battery replacement mean for your iPhone? The battery in your iPhone is a lithium-ion battery. Over time, with repeated charging and discharging, the battery's capacity gradually decreases. This is a natural and unavoidable process for all lithium-ion batteries. A degrading battery may have a ripple effect on how fast your iPhone functions. As a precaution against draining power and unexplained shutdowns, Apple's iOS can throttle your device's performance as a precautionary measure to conserve power. This can result in slow app launching, scroller stutter, and overall decreased responsiveness. With a new battery, you're essentially removing this bottleneck on performance and bringing your iPhone back to its prime condition.

iPhone Battery Replacement Options

1. Apple Store or Apple Authorized Service Providers

A visit to an Apple Store or an Apple authorized repair center has significant advantages. They use only original Apple parts to guarantee the quality and reliability are top-notch. And their technicians have gone through professional training on working with Apple devices. However, these services do cost more, since Apple's warranty doesn’t cover batteries that wear out from normal use.

2. Third-Party Repair Shops

Reliable third-party repair shops is also a great option. They typically offer lower costs and more accommodating locations. You can easily find one in your neighborhood. Be cautious, though, to ensure they offer high-quality replacement batteries. Using low-quality batteries can lead to inferior performance and can even damage your iPhone. So, before choosing a third-party repair shop, research intensely and read reviews from customers to ensure reliability.

3. DIY Replacement

If you're a DIYer with skilled hands, replacing the battery by yourself is feasible. Compared to other iPhone parts, swapping out a battery isn’t all that complicated. There are tons of battery replacement tutorials online, and with a few basic tools, you can totally pull it off. This method is generally the most affordable, but it has risks. Misoperation can harm other iPhone parts, and if your phone is still under warranty, the fix will void it instantly.

Before the Replacement: What You Need to Do

Before swapping out your iPhone battery, run through this quick checklist to make sure everything goes smoothly.

1. Backup Your iPhone

First up, backup everything. This is crucial, as even the simplest repairs can catch you off guard, and you don't want to lose any photos, messages, or app data. The easiest way is to backup with iCloud. Go to Settings, tap your name. Next, tap iCloud, scroll down and tap iCloud Backup. Then, tap Back Up Now. If you prefer to keep it local, you can also backup with your Mac or PC using the cable that came with your device. Open iTunes (or Finder on a newer Mac) and select your device. Click General in the Apple Devices app or Summary in iTunes. If you want to backup health data too, select Encrypt local backup. Either way, make sure that the backup is finished before moving on — better safe than sorry!

2. Update to the Latest iOS

Next, make sure your iPhone is running the latest iOS. Why? Software updates can effectively seal up bugs that can interfere with battery performance or the replacement process. Here's how to do it: Go to Settings, tap General, and then Software Update. If there's an update available, tap Download and Install. Again, let it finish before starting the repair. It could take several minutes, but it's worth it to avoid compatibility issues.

3. Turn Off Find My

This is a simple but important step, especially if you plan to get your battery replaced at a third-party repair shop or replace it by yourself. Find My can lock your phone if it detects "unauthorized" changes, which could leave you locked out in the middle of a repair. To turn it off, open Settings, tap your name, and then tap Find My. Tap Find My iPhone, then toggle the switch off. You'll need to enter your Apple ID password to confirm. Type it in, and you're all set.

After the Replacement: Tips to Prolong Your iPhone's Battery Life

Charge Smarter, Not Harder

To make your new iPhone battery last longer, good charging habits matter. Although your iPhone features overcharge protection, it's best to unplug it once the battery reaches 100%. The pro tip? Try to keep your iPhone battery between 20% and 80% most times.

Adjust Screen Brightness

Your phone screen is one of the biggest battery guzzlers — no surprise, since that bright screen sucks up a tremendous amount of power. Knocking it down even a notch can make a big difference in extending your iPhone's battery life.

Here's how: Swipe down from the top-right corner to open Control Center. Then simply drag the brightness slider down a bit. You might not even notice the difference, but your battery will!

Or you can have your iPhone to do the job for you. Go to Settings > Display & Brightness and turn on Automatic. Your phone will automatically adjust screen brightness depending on your usage environment. 

Control Background App Refresh

Ever wonder why your battery drains even when you're not using it? Blame background app refresh. It lets power consuming apps like social media update in the background and guzzles power.

Tap on Settings > General > Background App Refresh. You can turn it off entirely, or selectively — all depends on your needs and priorities.

Pisen iPhone Replacement Batteries

With over two decades of expertise in batteries, Pisen has earned a reputation for producing durable, performance-driven replacement batteries. Pisen iPhone Replacement Batteries are designed with precision, using premium lithium-ion cells to ensure longevity and safety.

First, Pisen batteries pack a little extra punch compared to the original, meaning you can get more time scrolling through apps, watching videos, or chatting with friends before needing to plug in. It's a small upgrade that makes a noticeable difference in your daily routine.

What's more, Pisen offers models for almost every iPhone generation. From the iPhone 7 up to the iPhone 15 series, Pisen has got you covered!

Finally, Pisen goes above and beyond by providing detailed tutorial videos. These videos take you through each step of the replacement process in a clear and concise manner. So, even if you've never opened an iPhone before and are completely new to DIY phone repair, going through the step-by-step instructions can make it seem quite easy to tackle!

Conclusion

Having your iPhone battery replaced can be a great way to give your device a new lease on life. Knowing when to swap your old battery out, how to prep your iPhone properly, and nailing those simple but effective habits will keep your trusted phone running strong for years.

Still weighing your options? Pisen's replacement batteries are worth a look. Designed with performance and reliability in mind, they work seamlessly with your iPhone. If you are handy enough to tackle the replacement yourself, Pisen's got you covered with step-by-step tutorials.

No matter which route you take — the Apple Store, third-party repair shops, or rolling up your sleeves — just do a little homework first.

Related reading: Top iPhone Replacement Battery Choices in 2025