Yes, you can replace an iPhone battery, but Apple and most users do not do it at home

You can physically remove and install a new battery in an iPhone yourself. The process is straightforward if you have the right tools — a pentalobe screwdriver, a spudger, and tweezers — and you follow the steps carefully. However, most people do not do this. Apple charges between $69 and $99 to replace the battery depending on your model, and authorized repair shops charge similar amounts. The reason most people choose professional replacement is that opening an iPhone risks damaging the display, water seals, and internal components if you slip or explore pressure in the wrong spot.

Your decision comes down to three things: whether your phone is still under warranty or covered by AppleCare+, whether you have the tools and steady hands for the work, and whether the cost of a replacement battery matters to you. If your phone is under warranty and the battery health has dropped below 80 percent, Apple will replace it at no cost. If you have AppleCare+, replacement costs $29. Outside of those programs, the out-of-pocket cost is $69 to $99, which is often less than buying a new phone but more than many people want to spend on a repair.

Key Takeaways

  • Apple replaces iPhone batteries for $69 to $99 depending on your model, or free if your phone is under warranty and the battery has degraded to below 80 percent health.
  • AppleCare+ covers battery replacement for $29, making it the cheapest route if you have the plan.
  • DIY battery replacement requires a pentalobe screwdriver, spudger, tweezers, and a steady hand, and risks damaging the display seal and internal components if you slip.
  • Third-party repair shops often charge $40 to $80 for battery replacement, but may not use genuine Apple parts and do not carry Apple's warranty on the repair.
  • Battery health drops naturally over time; most iPhones reach 80 percent health after 500 charge cycles, which typically takes one to two years of normal use.

How to check your iPhone battery health before deciding

Before you commit to any repair, check your battery health through your phone's settings. Go to Settings, then Battery, then Battery Health & Charging. You will see a percentage that tells you how much capacity your battery retains compared to when it was new. A battery at 80 percent or higher is still functional; one below 80 percent may drain faster and shut down unexpectedly under load.

If your battery is above 80 percent, the issue you are experiencing — slow performance, unexpected shutdowns, or fast drain — is usually not the battery itself. iPhones slow down intentionally when the battery is weak to prevent crashes, but if your battery health is still high, the slowness is more likely a software issue or a problem with another component. Check whether you have enough free storage (go to Settings > General > iPhone Storage) and whether you are running the latest iOS version (Settings > General > Software Update). Both of these can affect performance more than a battery at 85 percent health.

Apple's official replacement service and warranty coverage

Apple's battery replacement service is available at Apple Stores and through Apple's mail-in repair program. If you have a nearby Apple Store, you can make an appointment through the Apple Support app or website, bring your phone in, and usually have it back the same day or within a few days. If you do not have a store nearby, you can request a mail-in repair kit, send your phone to Apple, and they will replace the battery and return it to you.

The cost depends on your model and warranty status. If your phone is within one year of purchase and the battery has degraded due to a manufacturing defect, the replacement is free. If you have AppleCare+, you pay $29. If you are outside warranty and do not have AppleCare+, you pay $69 for iPhone 15 and newer, $79 for iPhone 14 and iPhone 13, and $89 for older models. These prices include the battery, labor, and a 90-day warranty on the repair itself.

One advantage of Apple's service is that they use genuine Apple batteries and maintain the phone's water resistance rating. When Apple replaces a battery, they reseal the phone to the same standard it left the factory. If you open the phone yourself or use a third-party shop, the water resistance may be compromised unless the shop has the proper equipment and training to reseal it correctly.

DIY battery replacement: tools, steps, and real risks

If you decide to replace the battery yourself, you will need a pentalobe screwdriver (the five-pointed star shape used on iPhones), a plastic spudger, tweezers, a heat gun or hair dryer, and a replacement battery. You can buy a battery replacement kit online for $20 to $40, which usually includes the battery, tools, and adhesive strips to reseal the phone. The actual replacement takes 30 minutes to an hour if you work slowly and carefully.

The process is: heat the edges of the phone to soften the adhesive, carefully pry open the display using the spudger, disconnect the battery connector, remove the old battery (which is glued down), install the new battery, reconnect the connector, and press the display back on. The hardest part is opening the phone without cracking the display — the adhesive is strong, and if you pry too hard or at the wrong angle, the glass will break. A cracked display costs $200 to $400 to replace, which wipes out any savings from the DIY battery replacement.

The second risk is the water seal. iPhones are sealed with adhesive strips around the edges. When you open the phone, you break those seals. If you use the adhesive strips that come in a kit, you can reseal it, but the seal will not be as strong as the factory seal. Water resistance is not may provide after a DIY replacement. If water gets inside the phone after you have opened it, Apple will not cover the damage under warranty, and the repair cost will be higher because the phone is already open.

Third-party repair shops: cost, quality, and trade-offs

Independent phone repair shops in most cities offer battery replacement for $40 to $80, which is cheaper than Apple but carries different risks. The main issue is parts quality. Some shops use genuine Apple batteries, but many use third-party batteries that are cheaper and may not hold a charge as long. A third-party battery might reach 80 percent health in 300 charge cycles instead of 500, meaning it will degrade faster.

The second issue is warranty. Apple's repair comes with a 90-day warranty on the battery and the work. Most independent shops offer 30 days or less, and some offer no warranty at all. If the battery fails after 60 days, you have no recourse. The third issue is water resistance. Not all independent shops have the equipment to properly reseal the phone after opening it. Some do, but you have to ask before you hand over your phone.

Before you choose an independent shop, ask whether they use genuine Apple parts, what warranty they offer, and whether they reseal the phone to maintain water resistance. Read reviews on Google Maps or Yelp to see what other customers say about their work. A shop with consistent five-star reviews and a clear warranty policy is more trustworthy than one with mixed reviews or no stated warranty.

When battery replacement makes sense versus when to replace the phone

A battery replacement makes financial sense if your phone is less than four years old, the battery health has dropped below 80 percent, and the rest of the phone works well. A new battery costs $69 to $99 and can extend the phone's usable life by one to two years. If your phone is five years old or older, the battery is just one of several components that may be wearing out. The display, speakers, and charging port all degrade over time, and fixing all of them can add up to the cost of a new phone.

Replace the phone instead of the battery if the display is cracked or the phone has water damage, because those repairs are expensive and often not worth fixing on an older model. Also replace the phone if you have already replaced the battery once and it is degrading again quickly — that suggests the phone's power management system is failing, not just the battery, and a new battery will not solve the underlying problem.

How to extend battery life and slow degradation

You cannot stop your battery from degrading, but you can slow it down. Batteries degrade fastest when they are hot, so avoid leaving your phone in direct sunlight or in a hot car. They also degrade when they are charged to 100 percent frequently. If you turn on Optimized Battery Charging in Settings > Battery > Battery Health & Charging, your phone will learn your charging patterns and avoid charging past 80 percent until you need it. This can extend battery life by several months.

Avoid using fast chargers constantly. A standard 5-watt charger charges more slowly but generates less heat, which is better for the battery. If you use a fast charger, use it only when you are in a hurry. Also, do not let your battery drain completely to zero regularly — charging from 20 percent to 80 percent is gentler on the battery than charging from 0 to 100 percent. These habits will not prevent degradation, but they will slow it enough that you may get an extra six months to a year out of your battery before replacement becomes necessary.

Frequently Asked Questions

How long does an iPhone battery last before it needs replacement?

Most iPhone batteries reach 80 percent health after 500 charge cycles, which typically takes one to two years of normal daily use. A charge cycle is one full discharge and recharge, not one day of use. If you charge your phone twice a day, you complete one cycle per day. If you charge it once every two days, you complete one cycle every two days.

Will opening my iPhone to replace the battery void the warranty?

Yes. If you open your iPhone yourself, Apple will not cover any damage that results from the opening, and they may refuse to repair other parts of the phone if they determine the damage was caused by the opening. Third-party repairs also void any remaining manufacturer warranty, though the repair shop's own warranty applies to their work.

Can I use a wireless charger to avoid battery degradation?

Wireless charging is slower than wired charging, so it generates less heat, which is slightly better for the battery. However, the difference is small — a wireless charger will not significantly extend battery life compared to a standard wired charger. The main benefit of wireless charging is convenience, not battery longevity.

What is the difference between a genuine Apple battery and a third-party battery?

Genuine Apple batteries are designed and tested to match your phone's power management system exactly. They hold a charge longer and degrade more slowly than most third-party batteries. Third-party batteries are cheaper but may not integrate as well with your phone's software, and they often degrade faster. The difference becomes noticeable after six months to a year of use.

Can I replace the battery in an iPhone 15 or newer?

Yes, but it is harder than older models. iPhone 15 and newer have stronger adhesive and more tightly packed components. The process is the same — heat, pry, disconnect, remove, install, reconnect — but requires more patience and care. The risk of damaging the display is higher. Most people choose Apple's service for these newer models rather than attempting it themselves.