Your iPhone shows a yellow battery icon when Low Power Mode is on

The yellow battery icon appears because you have Low Power Mode enabled on your iPhone. This is a setting you (or someone else) turned on deliberately — it is not a sign of damage or a malfunction. Low Power Mode reduces how hard your phone works so the battery lasts longer between charges.

When Low Power Mode is active, iOS dims your screen slightly, slows down background activity, and reduces performance on some features. The yellow color is straightforward Apple's way of telling you the phone is running in this reduced-power state. You can turn it off anytime.

Key Takeaways

  • A yellow battery icon means Low Power Mode is turned on, not that your battery is damaged or failing.
  • Low Power Mode reduces screen brightness, background app activity, and processing speed to extend battery life.
  • You can turn Low Power Mode off in Settings > Battery > Battery Health & Charging, or swipe down from the top-right corner and tap the battery icon.
  • Low Power Mode turns off automatically when your battery reaches 80 percent after charging, unless you disabled that setting.
  • Leaving Low Power Mode on all the time is safe but will make your phone feel slower and some features will not work at full speed.

How to turn off the yellow battery icon

The fastest way is to swipe down from the top-right corner of your screen to open Control Center, then tap the battery icon (it looks like a battery with a percentage inside). The icon will turn green and Low Power Mode will turn off when ready.

If you want to turn it off permanently or adjust when it turns on automatically, go to Settings > Battery > Battery Health & Charging. Tap "Low Power Mode" and toggle it off. You can also change the setting so Low Power Mode does not turn on automatically at 20 percent battery — just turn off "Turn On Automatically" in that same menu.

Why Low Power Mode exists and when it helps

Low Power Mode was designed to stretch your battery life when you are away from a charger and do not want your phone to die. It is most useful when you are traveling, at an event, or in a situation where you cannot charge for several hours.

The trade-off is real: your phone will feel noticeably slower. Apps take longer to open, downloads are slower, and some background tasks (like email fetching) happen less often. If you are at home or near a charger, there is no reason to keep it on.

What happens to your battery in Low Power Mode

Low Power Mode does not damage your battery or change how it ages. It straightforward uses less power by reducing what the phone does in the background. Your battery health is not affected by running in this mode, even for long periods.

However, if you leave Low Power Mode on all the time, you are choosing slower performance for no real benefit — your battery will drain at the same rate as a phone at normal speed once it reaches 80 percent and Low Power Mode turns off automatically anyway. The mode is meant to be temporary, not permanent.

When the yellow icon might mean something else

In rare cases, an iPhone might show a yellow battery icon even when Low Power Mode is off. This usually means there is a software glitch. Try restarting your phone: press and hold the side button and either volume button until "slide to power off" appears, then slide to shut down. Wait 10 seconds, then press the side button again to turn it back on.

If the yellow icon persists after a restart and Low Power Mode is definitely off, the issue is likely a software problem rather than a hardware one. You can also try going to Settings > General > Transfer or Reset > Reset > Reset All Settings, which clears out corrupted settings without deleting your data. If the problem continues after that, contact Apple Support or visit an Apple Store.

How to check if Low Power Mode is actually on

Open Control Center by swiping down from the top-right corner. Look for the battery icon — if it is yellow and has a lightning bolt inside, Low Power Mode is on. If the battery icon is green, Low Power Mode is off.

You can also check in Settings > Battery > Battery Health & Charging. If the toggle next to "Low Power Mode" is green and switched to the right, it is on. If it is gray and switched to the left, it is off.

Frequently Asked Questions

Does Low Power Mode damage my battery long-term?

No. Low Power Mode does not harm your battery or change how it ages. It straightforward reduces power consumption while active. Your battery health is not affected by using this mode, even regularly.

Will my phone charge faster if I turn off Low Power Mode?

No. Low Power Mode does not affect charging speed — it only affects how fast the battery drains while you are using the phone. Turning it off will not make your phone charge any quicker.

Can I turn off Low Power Mode and turn it back on automatically later?

Yes. Go to Settings > Battery > Battery Health & Charging, tap Low Power Mode, and make sure "Turn On Automatically" is toggled on. Your phone will turn Low Power Mode back on automatically when the battery drops to 20 percent.

Why did Low Power Mode turn on by itself?

If you have "Turn On Automatically" enabled in Settings > Battery > Battery Health & Charging, Low Power Mode turns on automatically when your battery reaches 20 percent. You can disable this setting if you do not want it to turn on without your permission.

Is it bad to leave Low Power Mode on all the time?

It is not bad for your phone, but it is not useful either. Your phone will straightforward run slower without any real battery benefit — Low Power Mode turns off automatically at 80 percent anyway. Keep it on only when you actually need the extra battery life.