Where to Find Your Battery Percentage on iPhone

Your iPhone shows remaining battery charge in the top-right corner of the screen as a percentage or a battery icon, depending on your settings. On newer iPhones with a notch or Dynamic Island, the percentage appears in the status bar at the very top. On older models with a home button, it sits in the upper right next to the signal bars.

If you see only a battery icon with no number, you can turn on the percentage display. Go to Settings > Battery > Battery Percentage and toggle it on. This gives you an exact number instead of guessing from the icon alone.

Key Takeaways

  • Battery percentage appears in the top-right corner of your screen, and you can enable the number display in Settings > Battery > Battery Percentage.
  • Battery Health shows how much capacity your battery retains compared to when it was new, found in Settings > Battery > Battery Health & Charging.
  • Normal battery health at 80 percent or above means your battery is functioning as expected; below 80 percent indicates gradual wear.
  • Checking battery health regularly helps you decide whether to replace the battery before performance becomes noticeably slow.

How to Check Battery Health on iPhone

Battery Health is different from remaining charge—it tells you whether your battery is aging normally or wearing out faster than expected. To find it, open Settings > Battery > Battery Health & Charging. You will see a percentage labeled Maximum Capacity, which shows how much charge your battery can hold compared to when it left the factory.

A new iPhone battery typically shows 100 percent maximum capacity. Over time, this number drops as the battery ages through normal use. Apple considers a battery healthy if it retains 80 percent or more of its original capacity. If your maximum capacity is below 80 percent, the battery is degraded but still functional—you may notice your phone drains faster or shuts down unexpectedly under heavy use.

What Battery Health Numbers Mean

Maximum Capacity tells you the overall health of your battery. At 100 percent, your battery is brand new or recently replaced. Between 90 and 100 percent, your battery is in excellent condition and should perform normally. Between 80 and 89 percent, your battery is still healthy but showing normal wear from age and use cycles.

Below 80 percent, your battery is degraded. You may notice your iPhone drains faster, especially during heavy tasks like gaming or video recording. The phone may also shut down suddenly when the battery is low, even if the percentage shows 10 or 15 percent remaining. This happens because the battery cannot deliver power fast enough to meet the phone's demands.

If your battery is below 50 percent maximum capacity, Apple recommends having it replaced. You can do this through Apple Support, an Apple Store, or an authorized service provider. Battery replacement is faster and cheaper than buying a new phone.

Understanding Battery Condition Status

Below the Maximum Capacity number, you may see a Battery Condition section that describes your battery's state. "Normal" means your battery is functioning as expected for its age. "Service Recommended" appears when maximum capacity has dropped significantly, usually below 80 percent, and Apple suggests you consider a replacement.

If you see "Service Not Available," your iPhone cannot read the battery properly. This sometimes happens after a non-Apple repair or if the battery connector is loose. You can try restarting your phone—hold the power button and either volume button, then slide to power off, wait 30 seconds, and turn it back on. If the message persists, contact Apple Support or visit an Apple Store.

Why Battery Health Degrades Over Time

Every time you charge your iPhone, the battery goes through a charge cycle. A full cycle means draining the battery from 100 percent to 0 percent, then charging it back to 100 percent. Partial charges also count toward cycles—two 50-percent charges equal one full cycle. Apple batteries are designed to retain 80 percent of their capacity after 500 full charge cycles.

Heat is the biggest enemy of battery health. Leaving your iPhone in direct sunlight, in a hot car, or running demanding apps while charging all speed up degradation. Cold temperatures also reduce battery performance temporarily, though the damage is usually reversible once the phone warms up. Using your phone while it charges, especially with power-hungry apps, generates heat and wears the battery faster.

Fast charging and wireless charging are convenient but generate more heat than standard charging. If you want to extend battery life, charge your phone overnight with a standard charger, keep it cool, and avoid letting it drain completely on a regular basis.

Checking Battery Usage by App

If your battery drains quickly but health looks normal, an app may be using too much power. Go to Settings > Battery > Battery Usage to see which apps consumed the most energy in the last 24 hours or the last 10 days. Tap the time period toggle at the top to switch between views.

Apps that use a lot of battery include maps, video streaming, games, and social media apps that run in the background. If one app stands out as using far more than others, try closing it when you are not using it, turning off background refresh for that app, or uninstalling it if you do not need it. Go to Settings > General > Background App Refresh to control which apps can run in the background.

Enabling Low Power Mode to Extend Battery Life

Low Power Mode reduces performance and background activity to stretch your battery further when charge is running low. Swipe down from the top-right corner of your screen to open Control Center, then tap the battery icon to turn on Low Power Mode. You can also enable it automatically by going to Settings > Battery > Low Power Mode and choosing "At 20%" or "At 10%".

When Low Power Mode is on, your phone runs slower, some visual effects are reduced, and apps refresh less often in the background. Email and messages still arrive, but with a slight delay. Most people do not notice the slowdown during normal use like texting, browsing, or calling. Low Power Mode does not harm your battery—it straightforward uses less power while it is active.

Frequently Asked Questions

Why does my battery percentage jump from 20 percent to 0 percent suddenly?

This usually means your battery health is degraded and cannot deliver power consistently. The battery may show 20 percent but lack the power to run your phone, so it shuts down to protect itself. This is normal behavior for an old battery and is a sign you should consider replacement soon.

Can I improve my battery health after it drops below 80 percent?

No, battery health cannot be improved once it degrades. The damage is permanent. However, you can slow future degradation by avoiding heat, using standard charging instead of fast charging, and not letting the battery drain completely every day. If health is already low, replacement is the only solution.

Is it bad to leave my iPhone plugged in overnight?

Modern iPhones have optimized battery charging that slows charging once the battery reaches 80 percent, so leaving it plugged in overnight is safe. However, keeping the phone cool while charging extends battery life. If your phone gets warm while charging, remove the case or move it to a cooler location.

What is the difference between maximum capacity and battery health?

Maximum capacity is the percentage—how much charge your battery can hold now versus when new. Battery health is the overall condition description, like "Normal" or "Service Recommended." Maximum capacity is the number; battery health is the interpretation of that number.

How often should I check my battery health?

Check it once every few months if you want to track wear over time, or whenever you notice your phone draining faster than usual. There is no need to check it weekly—battery health changes slowly. Most people only check it when they suspect a problem.