Where to find your iPhone's battery health information
Your iPhone stores detailed information about its battery condition in the Settings app, and you can view it in under a minute. Open Settings, then tap Battery, then Battery Health & Charging. The screen shows two key numbers: your battery's current capacity as a percentage, and its condition status.
The capacity percentage tells you how much charge your battery can hold compared to when it was new. A new iPhone battery is at 100 percent capacity. Over time—usually after 500 full charge cycles or roughly two years of normal use—this number drops. The condition status appears below the capacity and will say either Normal, Degraded, or Service Recommended.
Key Takeaways
- Battery Health & Charging is found in Settings > Battery > Battery Health & Charging and shows your current capacity percentage and condition status.
- Normal condition means your battery is working as expected; Degraded means it is aging but still functional; Service Recommended means Apple suggests having it replaced.
- Capacity typically drops to 80 percent after about 500 full charge cycles, which is normal wear and does not require when ready action.
- Your iPhone may slow down temporarily if the battery is too degraded to deliver peak power, but this throttling stops once the battery is replaced.
- You can request a battery replacement through Apple Support, an Apple Store, or an authorized service provider without losing your data.
What the capacity percentage means
The capacity number represents how much energy your battery can store right now, expressed as a percentage of its original capacity when the phone was brand new. If your battery shows 85 percent capacity, it can hold 85 percent of the charge it held on day one.
Apple considers 80 percent capacity the threshold for normal aging. Batteries that drop below 80 percent have aged more than expected, but they still work—they straightforward cannot hold as much charge between plugging in. A battery at 70 percent capacity will need to be charged more often than a new one, but it is not broken.
Capacity naturally declines over time because of how lithium-ion batteries work. Every time you charge and discharge the battery, it undergoes a chemical cycle that gradually reduces its ability to store energy. This is not a defect; it is the normal lifespan of the technology.
Understanding the condition status
Normal means your battery is functioning as expected for its age. Most iPhones show Normal condition until the battery reaches around 80 percent capacity, though the exact threshold varies slightly by model.
Degraded indicates your battery has aged beyond the normal range and is losing capacity faster than expected, but it is still safe to use. Your phone will not shut down or malfunction because of a Degraded battery. You may notice the phone needs charging more often, but that is the only practical difference.
Service Recommended means Apple has determined your battery should be replaced. This status typically appears when capacity drops below 80 percent and the battery is no longer performing reliably. At this point, your iPhone may also slow down temporarily to protect the battery from damage—a feature Apple calls performance management. Once you replace the battery, the slowdown stops.
When your iPhone slows down due to battery condition
If your battery condition is very poor, your iPhone may reduce its processing speed to prevent the battery from delivering more power than it safely can. This slowdown is temporary and protective—it keeps your phone from shutting down unexpectedly when you try to use demanding apps or features.
You can see whether performance management is currently active by returning to Battery Health & Charging. If it is on, the screen will display a message stating that your iPhone has experienced an unexpected shutdown and performance management is enabled. This does not mean your phone is broken; it means the battery cannot reliably power the processor at full speed.
Performance management turns off automatically once you replace the battery. You do not need to do anything in Settings—the slowdown is not a toggle you can disable yourself, because disabling it could cause your phone to shut down during normal use.
How to request a battery replacement
If your battery condition is Degraded or Service Recommended, you can have it replaced through Apple. Start by visiting support.apple.com or opening the Support app on your iPhone and selecting your device. You can also call Apple Support directly or visit an Apple Store in person.
When you contact Apple, have your phone's serial number ready—you can find it in Settings > General > About, under the Serial Number field. Tell them your battery condition status and capacity percentage. Apple will confirm whether a replacement is needed and schedule an appointment or arrange a mail-in repair.
Battery replacement typically costs money if your phone is out of warranty, though the cost varies by iPhone model. If your phone is still under the one-year limited warranty or you have AppleCare+, the replacement may be covered. Authorized service providers and some third-party repair shops also offer battery replacement, often at lower cost than Apple, though results vary in quality.
What happens to your data during battery replacement
Your photos, messages, apps, and settings stay on your phone during a battery replacement. Apple does not erase your device to replace the battery—the technician removes the old battery and installs a new one while your data remains intact.
If you are mailing your phone to Apple for repair, back up your data first using iCloud or a computer, just as a precaution. In the rare event something goes wrong during shipping or repair, you will have a copy of everything. You can back up to iCloud by opening Settings > [Your Name] > iCloud and tapping iCloud Backup, or by connecting to a computer and opening Finder (Mac) or iTunes (Windows).
Other reasons your iPhone might feel slow
A slow iPhone is not always caused by battery condition. Storage space, background app activity, and outdated software can all make your phone feel sluggish. Check your battery condition first—if it shows Normal, the slowness is likely something else.
If your storage is nearly full, your phone will slow down noticeably. Go to Settings > General > iPhone Storage to see how much space you have left. If you are using more than 90 percent of your storage, delete photos, videos, or apps you no longer need. If your software is outdated, go to Settings > General > Software Update and install any available updates.
Frequently Asked Questions
Is it normal for battery capacity to drop to 80 percent?
Yes. Apple designs iPhone batteries to retain 80 percent of their capacity after about 500 full charge cycles, which typically takes one to two years of regular use. Reaching 80 percent is not a sign of a defect—it is expected aging.
Can I replace my iPhone battery myself?
You can, but it is not recommended unless you have experience with electronics repair. The battery is glued to the phone, and removing it without proper tools can damage the display, logic board, or other components. Professional replacement through Apple or an authorized provider is safer and usually comes with a warranty on the work.
Will my iPhone stop working if the battery capacity gets very low?
No. Your phone will continue to work even at very low capacity—it will straightforward need to be charged more often. The only change in behavior is that performance management may slow down your phone if the battery cannot safely deliver peak power.
How often should I check my battery health?
You do not need to check it regularly. Battery Health & Charging is useful if your phone feels slow, drains quickly, or shuts down unexpectedly. If your phone is working normally, you can check it once every few months out of curiosity, but frequent checking is not necessary.
Does charging my phone overnight damage the battery?
Modern iPhones have built-in protections that stop charging at 100 percent and hold the battery at that level without overcharging. Overnight charging will not damage your battery. However, keeping your phone plugged in constantly at 100 percent for weeks or months may cause slightly faster aging over years, so unplugging it when fully charged is a minor best practice.