Yellow battery means Low Power Mode is on

When your iPhone battery icon turns yellow instead of green or red, it means Low Power Mode is active. This is a setting you or your phone turned on to extend battery life by reducing performance and limiting background activity. The yellow color is Apple's way of telling you the phone is running in a restricted state.

Low Power Mode reduces CPU speed, limits app refresh, turns off mail fetch, and disables some visual effects. Your phone will still work, but it may feel slower. The yellow icon stays until you turn Low Power Mode off or charge the battery to 80 percent, at which point it automatically disables.

Key Takeaways

  • A yellow battery icon means Low Power Mode is turned on, not that your battery is damaged or defective.
  • Low Power Mode activates automatically when your battery drops to 20 percent, or you can turn it on manually in Settings.
  • Turning off Low Power Mode requires going to Settings > Battery, or you can wait until your phone charges to 80 percent and it disables automatically.
  • The yellow color is temporary and does not indicate a hardware problem — it disappears as soon as Low Power Mode is off.

How Low Power Mode turns on automatically

Your iPhone activates Low Power Mode on its own when the battery level reaches 20 percent. You will see a notification asking if you want to enable it. If you tap "Enable," the battery icon turns yellow. If you ignore the notification, the phone will ask again at 10 percent battery.

On newer iPhones (iOS 16 and later), you can also set Low Power Mode to turn on automatically at a higher percentage. Go to Settings > Battery > Battery Health & Device Performance, then tap "Low Power Mode" and choose when you want it to set up — 20 percent is the default, but you can select 10 percent instead if you prefer.

Turning off Low Power Mode manually

To stop the yellow battery icon from showing, open Settings and tap Battery. Then tap "Low Power Mode" and toggle it off. The yellow icon disappears when ready, and your phone returns to full performance.

You can also turn it off from Control Center. Swipe down from the top-right corner of your screen (or up from the bottom on older models), find the battery icon or Low Power Mode toggle, and tap it to turn it off. The method depends on your iOS version and iPhone model, but both routes take less than 10 seconds.

Why you might want to keep Low Power Mode on

Low Power Mode extends battery life by 1 to 3 hours depending on how much you use your phone. If you are away from a charger for most of the day, leaving it on even when your battery is above 20 percent can prevent you from running out of power. The performance hit is usually minor for everyday tasks like texting, email, and web browsing.

Some people turn it on in the morning and leave it on all day. Others use it only when they know they will not have access to a charger. There is no penalty for using it — it does not damage the battery or wear it out faster. It is straightforward a trade-off between speed and battery life.

When the battery icon stays yellow even after charging

If your battery icon remains yellow after you charge your phone to 80 percent or higher, Low Power Mode did not turn off automatically. This usually means you manually enabled it and need to disable it the same way. Go to Settings > Battery > Low Power Mode and toggle it off.

On rare occasions, a software glitch can prevent Low Power Mode from disabling. If toggling it off does not work, restart your phone by holding the power button and sliding to power off, then turning it back on. After the restart, check Settings > Battery again to confirm Low Power Mode is off.

The difference between yellow, green, and red battery icons

Your iPhone battery icon changes color to show you different states. A green battery means your phone is plugged in and charging, or fully charged. A red battery means you have less than 20 percent charge remaining and should charge soon. A yellow battery means Low Power Mode is on.

The color is purely informational — none of these states damage your phone or battery. They are just visual signals to help you understand what your phone is doing and how much power you have left.

Frequently Asked Questions

Does Low Power Mode damage my battery?

No. Low Power Mode does not harm your battery or cause it to wear out faster. It straightforward reduces the phone's performance temporarily to use less power. You can use it as often as you want without any negative effects on battery health.

Will my apps work normally with Low Power Mode on?

Most apps work fine, but some features may be delayed or limited. Mail will not refresh in the background, cloud photo sync pauses, and some animations are disabled. Apps that need constant background activity may not work as expected, but basic functions like calling, texting, and web browsing are unaffected.

Can I turn off Low Power Mode notifications?

You cannot disable the notification that appears at 20 percent battery, but you can prevent Low Power Mode from turning on automatically. Go to Settings > Battery > Battery Health & Device Performance, tap Low Power Mode, and select "Never" to stop automatic set up. You can still turn it on manually whenever you want.

Why does my phone charge to 80 percent and stop?

If your phone stops charging at 80 percent, you may have Optimized Battery Charging turned on. This feature slows charging to reduce battery wear over time. It is separate from Low Power Mode. Go to Settings > Battery > Battery Health & Device Performance and toggle off Optimized Battery Charging if you want your phone to charge to 100 percent when ready.

Is yellow battery the same as a low battery warning?

No. A low battery warning appears when you have less than 20 percent charge and tells you to charge your phone. The yellow battery icon appears when Low Power Mode is on, which can happen at any charge level if you turn it on manually. They are two different signals.