The battery sits behind the screen, sealed inside the phone body
Your iPhone battery is not in a removable compartment on the back or bottom. Instead, it is glued to the inside of the phone frame, directly behind the display. You cannot open an iPhone yourself without specialized tools and risk damaging the screen, logic board, or battery itself. If you need to replace the battery, Apple or an authorized repair shop must disassemble the phone.
The exact position varies slightly by model. In most iPhones, the battery occupies the lower half of the interior space, running roughly from the bottom edge up toward the middle of the phone. On larger models like the Pro Max, the battery is longer to fit the bigger frame. On smaller models like the SE, it is more compact but still in the same general location—behind the screen, sealed in.
Key Takeaways
- The iPhone battery is permanently glued inside the phone behind the display and cannot be removed by the user without professional tools.
- Opening an iPhone yourself will likely break the screen seal or damage internal components, voiding any warranty.
- Apple and authorized repair shops can replace the battery in about an hour, and the cost depends on your phone model and whether it is still under warranty.
- You can check your battery health through Settings > Battery > Battery Health & Charging to see if replacement is needed.
- Batteries degrade over time and typically hold less charge after 500 full charge cycles, which usually takes two to three years of normal use.
How to check if your battery needs replacement
Before paying for a replacement, check your battery's current health. Go to Settings, then tap Battery, then Battery Health & Charging. You will see a percentage labeled "Maximum Capacity." This tells you how much charge your battery can hold compared to when it was new. A battery at 80 percent capacity or higher is still functioning normally. Below 80 percent, you may notice the phone drains faster or shuts down unexpectedly under load.
You will also see a section called "Condition." If it says "Normal," your battery is fine. If it says "Service Recommended," the battery is degraded but still usable. If it says "Service Not Available," the phone detected a problem that requires professional diagnosis. Do not ignore "Service Not Available"—this usually means the battery is failing and could stop holding charge suddenly.
What happens when you take it to Apple or an authorized repair shop
Apple's battery replacement process takes about one hour at most locations. The technician will use a heat gun to soften the adhesive holding the battery in place, then carefully peel it away from the frame. They will disconnect the battery connector, remove the old battery, install a new one, and reseal the phone. The entire phone is tested before you leave to make sure the screen, speakers, and other components still work.
Authorized repair shops (not just any phone repair store) follow similar steps but may have slightly different timelines depending on how busy they are. Some shops can do it the same day; others may need 24 hours. Ask when you call or visit. If you go to an unauthorized repair shop, you lose any remaining warranty coverage, and the repair may damage the water resistance seal that keeps moisture out of your phone.
Battery replacement costs and warranty coverage
If your phone is still under the one-year limited warranty that comes with every new iPhone, and the battery has degraded to below 80 percent capacity due to a manufacturing defect, Apple will replace it at no cost. However, if the battery failed because of normal wear and tear (which is the case for most phones after two years), you will pay a service fee.
The cost varies by model. Older models like the iPhone 11 or SE typically cost less to replace than newer Pro models. Prices range from around $50 to $100 at Apple, depending on the phone. AppleCare+ coverage, if you purchased it when you bought the phone, covers battery replacement at no additional cost as long as the phone is still under the plan. Check your coverage by going to Settings > General > About and scrolling to the AppleCare+ section.
Why the battery is sealed inside
Apple sealed the battery inside the phone starting with the iPhone 6s to make the phone thinner, lighter, and more water-resistant. A removable battery would require a back panel or compartment, which adds thickness and creates gaps where water can seep in. The sealed design also lets Apple use the entire interior space for the battery, logic board, and other components without wasting room on a removable case.
This design choice means you cannot swap the battery yourself, but it also means your phone is less likely to suffer water damage from rain, spills, or brief submersion. The trade-off is that battery replacement requires a trip to a repair shop instead of a five-minute DIY swap like older phones allowed.
How to extend battery life between replacements
You can slow down battery degradation by changing a few habits. Keep your phone out of extreme heat—do not leave it in a hot car or direct sunlight for long periods. Heat speeds up chemical breakdown inside the battery. Avoid letting the battery drain completely to zero regularly; instead, charge it when it reaches 20 percent. Charging from 20 to 80 percent is easier on the battery than charging from 0 to 100 percent.
Enable Optimized Battery Charging in Settings > Battery > Battery Health & Charging. This feature learns your charging habits and slows down charging to 80 percent overnight, then finishes the last 20 percent right before you wake up. This reduces the time the battery spends at full charge, which is when degradation happens fastest. You can also reduce screen brightness and close background apps to use less power, which means fewer charge cycles per week.
What to do if your battery is swelling
In rare cases, a failing battery can swell inside the phone, pushing the screen or back panel outward. If you notice your phone is warped, the screen is lifting away from the frame, or the back is bulging, stop using it when ready and take it to Apple or an authorized repair shop right away. A swollen battery can overheat or catch fire, especially if the phone is dropped or squeezed.
Do not try to open the phone yourself or leave it plugged in while waiting for your appointment. If you cannot reach a repair shop the same day, power the phone off and leave it unplugged in a safe place away from flammable materials. Apple will prioritize a swollen battery as an urgent repair and usually can fit you in within hours.
Frequently Asked Questions
Can I replace the iPhone battery myself?
You can attempt it with a heat gun, suction cup, and battery removal tools, but you will almost certainly damage the screen or internal components. The adhesive is strong, and the battery connector is fragile. Professional replacement is safer and costs less than repairing accidental damage.
How long does an iPhone battery last before it needs replacement?
Most iPhone batteries degrade to 80 percent capacity after about 500 full charge cycles, which typically takes two to three years of normal daily use. Some people need replacement sooner if they charge multiple times per day; others can go longer with lighter use.
What is the difference between Apple and an authorized repair shop?
Both use genuine parts and follow the same repair standards. Apple stores are directly owned by Apple, while authorized shops are independent businesses certified by Apple. Both maintain your warranty and water-resistance seal. Authorized shops may have shorter wait times in some areas.
Will replacing the battery fix my phone if it keeps shutting down?
Maybe. If the battery health is below 80 percent and the phone shuts down under heavy use, a new battery will fix it. If the battery health is normal but the phone still shuts down, the problem is something else—a logic board issue, software glitch, or damaged power connector—and you need a technician to diagnose it.
Does AppleCare+ cover battery replacement?
Yes, AppleCare+ covers battery replacement at no cost as long as the battery has degraded below 80 percent capacity and the plan is still active. Without AppleCare+, you pay the service fee unless the phone is still under the one-year limited warranty and the degradation is due to a manufacturing defect.