Where to find your battery percentage on the home screen

The quickest way to see how much charge your iPhone has left is to look at the battery icon in the top-right corner of your screen. On newer iPhones without a notch or Dynamic Island, this icon shows a small rectangle that fills with color as your battery drains — green means plenty of charge, yellow means moderate charge, and red means low battery.

If you want a number instead of just the icon, swipe down from the top-right corner to open Control Center. The battery percentage appears at the top of that panel. You can also enable a percentage display that stays on your home screen all the time by going to Settings > Battery, then toggling on Battery Percentage.

Key Takeaways

  • The battery icon in the top-right corner shows your current charge level, and Control Center displays the exact percentage.
  • Battery Health in Settings shows how much capacity your battery retains compared to when it was new — 80% or above is normal for older phones.
  • Low Power Mode extends battery life by slowing performance and reducing background activity, and you can turn it on manually or set it to set up automatically at 20%.
  • iPhones with iOS 16 or later show estimated time remaining when you swipe to Control Center, so you can plan around when you need to charge.
  • Battery health degrades over time and with use, but Apple replaces batteries that fall below 80% capacity under warranty.

Checking battery health in Settings

Battery percentage tells you how much charge you have right now. Battery Health tells you something different — how much total capacity your battery still holds compared to when it was brand new. A new iPhone battery is at 100% health. After a year or two of normal use, it might be at 90% or 85%. This is normal and expected.

To see your battery health, go to Settings > Battery > Battery Health & Charging. You will see a number like "85% Maximum Capacity." This means your battery can now hold 85% of the charge it could hold on the day you bought the phone. If the number is 80% or higher, your battery is in good shape. If it drops below 80%, Apple considers it degraded, and you may notice the phone drains faster or shuts down unexpectedly under heavy use.

The same screen also shows Charging Optimization status. If it says "Optimized Battery Charging is on," your phone is learning your charging habits and slowing down charging to 80% overnight, then finishing the last 20% right before you wake up. This extends battery lifespan. You can turn this off if you prefer your phone to charge fully as soon as it is plugged in.

Understanding Low Power Mode and when to use it

When your battery is running low, your iPhone offers Low Power Mode. This feature reduces performance, limits background app refresh, and turns off some visual effects to stretch your charge. You can turn it on manually at any time by opening Control Center and tapping the battery icon, or you can let your phone turn it on automatically when the battery hits 20%.

Low Power Mode does not harm your battery — it is straightforward a way to use less power when you need to. Many people turn it on proactively when they know they will be away from a charger for hours. The trade-off is that apps may load slightly slower and some features like mail fetch and location services run less frequently. Once you plug in and charge past 80%, Low Power Mode turns off on its own.

Checking estimated time remaining before your battery dies

On iPhones running iOS 16 or later, Control Center shows an estimate of how long your battery will last at your current usage. Swipe down from the top-right corner and look below the battery percentage — you will see text like "About 4 hours remaining" or "About 12 hours remaining." This estimate updates as you use your phone and changes based on what apps you are running.

This estimate is useful for planning. If you see you have two hours of battery left and you are about to take a long commute, you know you should find a charger or turn on Low Power Mode. The estimate assumes your usage pattern stays the same, so if you switch from browsing to gaming, the time remaining will drop.

Why battery health declines and what to do about it

All lithium-ion batteries, including the one in your iPhone, lose capacity over time. Every charge cycle — from 0% to 100% — causes tiny chemical changes inside the battery. After 500 full charge cycles, Apple says you can expect the battery to retain about 80% of its original capacity. After 1,000 cycles, it may be at 70% or lower.

You cannot stop this process, but you can slow it down. Keep your phone cool when charging — avoid leaving it in direct sunlight or in a hot car. Avoid letting the battery drain all the way to 0% regularly. Use Optimized Battery Charging if you charge overnight. If your battery health drops below 80% and you notice your phone shutting down unexpectedly or draining very fast, Apple will replace the battery for a fee, or for free if your phone is still under warranty or covered by AppleCare+.

What to do if your battery is draining too fast

If your battery percentage is dropping faster than it should, the problem might not be the battery itself — it might be an app using too much power. Go to Settings > Battery and look at the list of apps. The apps using the most battery appear at the top. If you see an app you do not use often draining significant power, you can uninstall it or check if an update is available.

Background app refresh can also drain battery. Go to Settings > General > Background App Refresh and turn it off for apps you do not need to update in the background. Location services, especially "Always" location access, also consume power quickly. Go to Settings > Privacy & Security > Location Services and change apps from "Always" to "While Using" or "Never" if you do not need constant tracking.

If battery health is still above 80% but your phone is draining fast, try restarting it. Hold the power button and volume button together until the power-off slider appears, then slide to power off. Wait 10 seconds and power it back on. If the problem persists, a full backup and restore through a computer or iCloud may help, but that is a longer process — contact Apple Support if you want to try that route.

Frequently Asked Questions

What battery health percentage should I be concerned about?

Anything above 80% is normal and healthy. Between 70% and 80%, your battery is aging but still functional. Below 70%, you may notice the phone drains faster or shuts down unexpectedly during heavy use. If battery health drops below 80% and you want a replacement, Apple will do it for a fee outside of warranty.

Does using Low Power Mode damage my battery?

No. Low Power Mode straightforward reduces power consumption by limiting background activity and performance. It does not stress the battery or cause long-term damage. You can use it as often as you want without harm.

Why does my battery health show lower than I expected for a new phone?

If your phone is brand new and battery health is below 100%, it may have been sitting in storage or on display before you bought it. Batteries naturally lose a small amount of capacity over time even when not in use. If health is significantly below 100% on a phone you just bought, contact the retailer or Apple.

Can I check battery health on an older iPhone model?

Battery Health & Charging is available on iPhone 6s and later running iOS 11.3 or newer. If you have an older model or older iOS version, you will not see this screen, but you can still see your current battery percentage in Control Center or the status bar.

What does "Charging Optimization" mean, and should I turn it off?

Charging Optimization learns when you typically charge your phone and slows charging to 80% overnight, then finishes the last 20% right before you wake up. This reduces the time your battery spends at 100%, which extends its lifespan. You can turn it off if you prefer your phone to charge fully when ready, but leaving it on is better for long-term battery health.