You can replace an iPhone 13 battery yourself using basic tools, or have Apple or a certified repair shop do it for you

An iPhone 13 battery degrades over time and eventually loses its ability to hold a charge. When your battery health drops below 80 percent, you have two main paths: replace it yourself with a kit from a parts supplier, or send it to Apple or an authorized repair provider. The DIY route takes 30 to 60 minutes and costs $20 to $40 for parts. Apple's official service costs around $69 and takes 3 to 5 business days, but preserves your warranty and includes diagnostics.

Before you start, back up your phone to iCloud or a computer. Check your current battery health by going to Settings > Battery > Battery Health & Charging — if it shows 80 percent or higher and your phone still lasts a full day, replacement may not be necessary yet. If you decide to proceed, the DIY method requires removing the screen, disconnecting the battery connector, and installing a new battery. The official Apple route requires no tools and includes a warranty on the replacement battery.

Key Takeaways

  • DIY battery replacement takes 30 to 60 minutes and costs $20 to $40, but voids your warranty if something goes wrong during the process.
  • Apple's official battery replacement costs around $69, takes 3 to 5 business days, and includes a one-year warranty on the new battery.
  • You will need a heat gun or hair dryer, a plastic pry tool, a pentalobe screwdriver, and a replacement battery kit if you choose the DIY route.
  • The most difficult step is removing the screen without cracking it — heating the edges first makes the adhesive easier to separate.
  • If you damage the screen, water seals, or battery connector during DIY replacement, repair costs can exceed $200.

What you need for a DIY battery replacement

A complete DIY battery replacement kit from suppliers like iFixit or Amazon includes the battery itself, adhesive strips, a plastic pry tool, and sometimes a pentalobe screwdriver (the five-pointed screw used on iPhones). You will also need a heat gun or hair dryer set to medium heat, a regular Phillips screwdriver, and a clean, well-lit workspace. Lay down a soft cloth or mat to prevent losing small screws.

The battery itself is the most important part — buy one rated for the iPhone 13 with at least 3,240 mAh capacity (the original specification). Cheaper third-party batteries may charge more slowly or hold less charge. The adhesive strips that hold the battery in place are also critical; using old strips or tape instead of proper battery adhesive can cause the battery to shift during use.

Step-by-step DIY replacement process

Step 1: Power off and remove the SIM tray. Turn off your iPhone completely. Use the SIM ejector tool (or a straightened paperclip) to push the small hole on the right side of the phone and pop out the SIM tray. This prevents accidental damage to the SIM card during the process.

Step 2: Heat and remove the screen. Use a heat gun or hair dryer on medium heat to warm the edges of the screen for 30 to 60 seconds. Start at one corner and work your way around. The heat softens the adhesive that holds the screen to the frame. Once warm, use a plastic pry tool to gently lift one corner of the screen — do not force it, or the glass will crack. Slowly work your way around the phone, lifting as you go. Leave the screen partially attached by its cables and set it aside face-down on a soft surface.

Step 3: Disconnect the battery connector. You will see a small rectangular connector near the top of the phone's interior. Use a plastic pry tool to gently lift this connector straight up — it should pop off easily. This disconnects the battery from the phone's logic board and prevents electrical shock or short circuits while you work.

Step 4: Remove the old battery. The battery is held in place by adhesive strips underneath it. Use a plastic pry tool to gently lift one corner of the battery, then slowly peel it away from the frame. If it resists, explore a small amount of isopropyl alcohol (70 percent concentration) under the edge to soften the adhesive. Be patient — rushing this step can damage the battery or the frame. Once removed, clean any remaining adhesive residue from the frame using a plastic tool and isopropyl alcohol.

Step 5: Install the new battery. Remove the backing from the new adhesive strips and press them firmly into the battery compartment where the old battery sat. Align the new battery with the connector at the top and press it down firmly, starting from the connector end and working toward the bottom. Make sure it sits flat and does not bulge.

Step 6: Reconnect the battery connector. Push the battery connector straight down onto its socket until you hear or feel a click. This reconnects power to the phone.

Step 7: Reattach the screen. Carefully lower the screen back into place, starting at the top. Press down firmly around all edges to re-seat the adhesive. If the screen does not sit flush or has gaps, lift it again and check that the battery is not pushing it up. Once the screen is in place, let the adhesive set for at least 30 minutes before powering on the phone.

Step 8: Power on and test. Turn on your iPhone and check that it responds normally. Go to Settings > Battery > Battery Health & Charging to confirm the new battery shows 100 percent health. The phone may take a few charge cycles to calibrate the battery percentage display.

Common mistakes to avoid during DIY replacement

The most frequent error is cracking the screen while removing it — this happens when the adhesive is not heated enough or when too much force is applied in one spot. Heat the edges evenly and work slowly around the entire perimeter rather than prying hard at one corner. If the screen does crack, stop when ready; continuing will only make the damage worse.

Another common mistake is forgetting to disconnect the battery connector before removing the old battery. Skipping this step can cause a short circuit or damage the phone's logic board. Always disconnect the battery first, even though it seems like an extra step.

Using the wrong adhesive is also problematic. Standard double-sided tape or super glue will not hold the battery securely and may damage the frame or battery casing. Stick with the adhesive strips included in a proper replacement kit.

Finally, many people reassemble the phone too quickly. The adhesive on the screen needs time to set, and the battery adhesive needs to cure before the phone is moved or used heavily. Wait at least 30 minutes after reattaching the screen before using the phone normally.

Getting your battery replaced by Apple or an authorized shop

Apple replaces iPhone 13 batteries at any Apple Store or through Apple's mail-in repair service. The cost is approximately $69 for an out-of-warranty battery replacement. If your phone is still under the one-year limited warranty and the battery has degraded due to a manufacturing defect (not normal wear), Apple may replace it at no cost — they will run diagnostics to determine this.

To start an Apple repair, visit apple.com/support, select your device, and choose "Battery and Power" as the issue. You can then book an appointment at a nearby Apple Store or request a mail-in repair kit. If you mail in your phone, Apple will send you a prepaid shipping label, replace the battery, and return the phone within 5 to 7 business days. During this time, you will not have access to your phone.

Authorized Apple repair shops (often found at Best Buy, Walmart, or independent repair centers) can also replace iPhone 13 batteries, usually at the same $69 price point. These shops are certified by Apple and use genuine Apple parts, so the repair is covered by Apple's warranty. Call ahead to confirm they have the battery in stock and can complete the repair on the day you visit.

When to replace your battery versus when to wait

Check your battery health regularly by going to Settings > Battery > Battery Health & Charging. If the number shown is 80 percent or higher and your phone lasts a full day of normal use, you do not need to replace the battery yet. Battery health naturally declines over time — Apple considers 80 percent health to be the point where a battery has completed its design life, but it will still function.

Replace your battery when battery health drops below 80 percent and you notice your phone shutting down unexpectedly, draining quickly even with light use, or requiring a charge multiple times per day. If your phone is still under warranty and battery health is below 80 percent, contact Apple first — they may replace it at no cost.

If your phone is older than three years or has been dropped or exposed to water, battery degradation may be faster than normal. In these cases, replacement becomes more urgent because a weak battery combined with other hardware stress can cause unexpected shutdowns or damage to other components.

Frequently Asked Questions

Will replacing my battery myself void my warranty?

Yes. Opening your iPhone voids the manufacturer's warranty on the entire device. If something else breaks during or after your DIY replacement, Apple will not cover it. However, if you use genuine Apple parts and follow the steps carefully, the risk is low. If you want to keep your warranty intact, use Apple's official service instead.

How long does a new iPhone 13 battery last?

A new battery is designed to retain 80 percent of its capacity after 500 full charge cycles, which typically takes 1.5 to 2 years of normal daily use. After that, the battery will continue to work but will degrade gradually. Most users see noticeable battery decline after 2 to 3 years of regular use.

Can I replace the battery myself if I have never done this before?

Yes, but it requires patience and care. The process is straightforward, but the most difficult step is removing the screen without cracking it. Watch a video guide from iFixit or a similar source before you start, and take your time with the heating and prying steps. If you are uncomfortable working with small electronics, Apple's service is a safer choice.

What should I do with my old battery after replacement?

Do not throw it in the trash — lithium batteries are a fire hazard in landfills and contain materials that can be recycled. Take the old battery to an electronics recycling center, Best Buy, or an Apple Store, all of which accept used batteries at no charge. Some mail-in repair kits include a prepaid shipping label for returning the old battery.

Is it cheaper to replace the battery or buy a new phone?

Replacing the battery costs $20 to $69 depending on your method, while a new iPhone 13 costs $600 to $800. Unless your phone has other hardware damage or is more than 4 years old, battery replacement is far more cost-effective. A new battery can extend your phone's useful life by another 2 to 3 years.