Replace your iPhone battery when it no longer holds a full day of charge, shuts down unexpectedly at 20–30% battery, or shows a red battery icon in Settings
Your iPhone battery degrades over time. Apple designs them to retain 80% of their original capacity after 500 full charge cycles—roughly two years of normal use. Once you hit that point, you'll notice the phone drains faster, dies suddenly even when the battery percentage says it has charge left, or gets noticeably slower during demanding tasks. These are the real signs that replacement makes sense, not just inconvenience.
You don't have to replace the battery the moment it hits 80% capacity. Many people run their phones for three, four, or five years before the degradation becomes a real problem. But if your phone is shutting down unexpectedly, won't last through a workday, or is throttling performance to protect itself, replacement will restore it to usable condition.
Key Takeaways
- Check your battery health in Settings > Battery > Battery Health & Charging; if maximum capacity is below 80%, replacement will improve performance and longevity.
- Unexpected shutdowns at 20–30% battery, rapid drain during light use, or a red battery icon all signal that replacement should happen soon.
- Apple and authorized service providers replace batteries for a fixed fee that varies by iPhone model, typically $50–$100.
- Third-party repair shops often charge less but may use non-original parts and could void any remaining warranty coverage.
- Battery replacement usually takes one to three business days at Apple; mail-in service takes longer but works if no local store is nearby.
How to check your battery health right now
Open Settings, tap Battery, then tap Battery Health & Charging. You'll see two numbers: Maximum Capacity and Condition. Maximum Capacity tells you what percentage of the battery's original charge it can still hold. If it says 85%, your battery holds 85% of what it did when new. Condition will say either "Normal" or "Service Recommended"—Apple shows "Service Recommended" when capacity drops below 80%.
This screen also shows whether your phone is throttling performance to protect the battery. If you see a message about performance management being active, your phone is intentionally running slower to prevent unexpected shutdowns. Replacing the battery will restore full speed.
Signs your battery needs replacement soon
The phone shuts down without warning, even though the battery percentage shows 20%, 30%, or higher. This happens because the battery can no longer deliver the power the phone needs all at once, so the system cuts power to protect itself. It's the most common reason people replace batteries.
The phone drains noticeably faster than it used to, even during light use like texting or browsing. You're charging it twice a day when you used to charge it once. This is normal battery aging, but it's also a sign that replacement will give you back a full day of use.
The battery icon turns red frequently, or the phone gets warm during normal tasks. Warmth during charging is normal, but heat during light use means the battery is working harder than it should. A red icon means you're below 20% charge and should plug in soon.
Where to replace your battery
Apple replaces batteries at Apple Stores and through mail-in service. You can also go to an Apple Authorized Service Provider—these are independent repair shops certified by Apple to use genuine parts and follow Apple's standards. Both routes use original Apple batteries and preserve your warranty. The cost is the same whether you go to Apple or an authorized provider: typically $69 for iPhone 11 and newer, $79 for iPhone XS and older models, though prices vary slightly by region and model.
Third-party repair shops—local phone repair stores, mall kiosks, and some big-box retailers—often charge $30–$60 less. They may use non-original batteries, which can affect performance and longevity. Using a non-original battery may also void any remaining AppleCare coverage. If cost is the main concern, ask the shop whether they use original or third-party parts, and what warranty they offer on the replacement.
How long replacement takes
At an Apple Store, battery replacement usually takes one to three business days. You can make an appointment online or walk in; walk-ins may wait longer. Some stores offer same-day service if you arrive early and the store isn't busy, but don't count on it.
Mail-in service takes longer—typically five to seven business days total, including shipping both ways. Apple will send you a prepaid shipping box, you pack the phone, and they send it back with the new battery installed. This works well if you don't have an Apple Store nearby or can live without your phone for a week.
Third-party shops vary widely. Many can replace a battery the same day or next day, which is faster than Apple. Call ahead to ask about their turnaround time and whether they have the battery in stock for your model.
What happens to your old battery
Apple and authorized providers recycle the old battery. You don't need to do anything—they handle it as part of the service. Third-party shops should also recycle it, but ask before you leave. Lithium batteries shouldn't go in the trash or regular recycling; they need to go to an e-waste facility or a retailer that takes them back.
Cost comparison and what to expect after replacement
| Service Type | Typical Cost | Turnaround | Battery Type | Warranty Impact |
|---|---|---|---|---|
| Apple Store | $69–$79 | 1–3 days | Original Apple | Preserves AppleCare |
| Authorized Service Provider | $69–$79 | 1–3 days | Original Apple | Preserves AppleCare |
| Third-party shop | $30–$60 | Same day–2 days | Original or third-party | May void AppleCare |
| Mail-in (Apple) | $69–$79 | 5–7 days | Original Apple | Preserves AppleCare |
After replacement, your phone should charge to 100% and hold that charge through a full day of normal use. Performance should feel snappier if throttling was active. The new battery will have its own degradation curve—it will lose about 1% capacity per month under normal use, so you'll get another two to three years before thinking about replacement again.
Frequently Asked Questions
Can I replace the battery myself?
You can, but it's difficult and risky. iPhones are glued together, and opening one requires heat, special tools, and patience. If you slip, you can damage the screen, logic board, or battery itself—which can catch fire. Unless you've done phone repairs before, the $70 Apple charges is worth the safety and warranty protection.
Will replacing the battery make my phone feel new again?
It will restore battery life and speed if throttling was active. It won't fix a cracked screen, slow storage, or other hardware wear. If your phone is also old in other ways, replacement may not feel like a major upgrade—but it will buy you another two to three years of usable life.
What if my phone is still under warranty?
If the battery is failing due to a manufacturing defect (not normal wear), Apple will replace it free during the one-year limited warranty. Check your coverage at apple.com/support by entering your serial number. If you're past one year, you pay the standard fee.
Should I replace the battery or buy a new phone?
If your phone is two to four years old and otherwise works well, battery replacement is much cheaper than a new phone and extends its life. If it's five years or older, the decision depends on whether other parts are failing and whether you want the new features in current models. Battery replacement alone won't fix a broken screen or failing storage.
Does a new battery come with a warranty?
Apple and authorized providers warranty the battery replacement for one year. If the new battery fails within that time, they'll replace it again free. Third-party shops offer varying warranties—ask before you pay.