A yellow battery icon means your iPhone is in Low Power Mode

The yellow battery icon on your iPhone appears when Low Power Mode is turned on. This is a setting you can enable yourself, or your phone may set up it automatically when the battery drops to 20 percent. Low Power Mode reduces performance and limits background activity to extend how long your phone will run before it needs to charge.

The yellow color is straightforward a visual signal — it does not mean your battery is damaged or failing. It means your phone is deliberately running in a restricted state to preserve power. You can turn Low Power Mode off at any time, even if your battery is low, though your phone will then drain faster.

Key Takeaways

  • A yellow battery icon indicates Low Power Mode is active, which slows performance to extend battery life.
  • Low Power Mode turns on automatically at 20 percent battery on most iPhones, but you can enable it manually at any charge level.
  • Turning off Low Power Mode restores full performance but causes the battery to drain faster.
  • The yellow color is a visual indicator only and does not signal a hardware problem with your battery.

How to turn Low Power Mode on and off

To toggle Low Power Mode, open Settings, then tap Battery or Battery and Device Management (the exact name depends on your iOS version). You will see a switch labeled Low Power Mode. Tap it to turn the mode on or off.

On newer iPhones running iOS 17 or later, you can also swipe down from the top right corner to open Control Center, then tap the battery icon to access power settings quickly. The yellow battery icon will disappear from your status bar once Low Power Mode is off.

What Low Power Mode actually does to your phone

When Low Power Mode is on, your iPhone reduces CPU and GPU speed, limits app refresh in the background, and turns off some visual effects. Mail stops fetching automatically, location services run less often, and video quality in FaceTime calls may drop. Downloads and streaming continue, but at lower priority.

These changes are noticeable. Apps may open more slowly, scrolling can feel less smooth, and some features like Hey Siri may respond with a slight delay. The trade-off is real: Low Power Mode typically extends battery life by several hours, depending on how you use your phone.

When your iPhone turns on Low Power Mode automatically

Your iPhone will prompt you to enable Low Power Mode when the battery reaches 20 percent. If you dismiss the prompt, the phone will ask again at 10 percent. You can ignore these prompts and keep using your phone at full speed — Low Power Mode will not force itself on unless you choose to enable it.

Some users turn on Low Power Mode manually before the battery gets low, especially if they know they will not have access to a charger for several hours. There is no penalty for using Low Power Mode at 80 percent battery if you want to stretch the charge longer.

Why your iPhone might show yellow battery even when plugged in

If you see a yellow battery icon while your phone is charging, Low Power Mode is still active. Charging and Low Power Mode are separate — your phone will charge normally even in Low Power Mode, but it will remain in the restricted state until you turn the mode off manually.

Some users leave Low Power Mode on even after charging to full because they prefer the longer battery life, even at the cost of performance. This is a personal choice and does not harm your phone.

The difference between yellow battery and red battery

A red battery icon means your iPhone has less than 5 percent charge remaining and will shut down soon. A yellow battery icon means Low Power Mode is on — your charge level could be anywhere from full to nearly empty. The two icons signal different things: red is about how much power you have left, yellow is about how your phone is using that power.

If you see a red battery icon, your phone is about to turn off regardless of whether Low Power Mode is on. Plug in a charger when ready if you need to keep using your device.

Does Low Power Mode wear out your battery faster

No. Low Power Mode does not damage your battery or cause it to degrade faster. In fact, running your phone at lower power and temperature may reduce long-term wear on the battery. Your iPhone's battery degrades naturally over time with every charge cycle, but Low Power Mode does not accelerate that process.

If anything, using Low Power Mode regularly may help preserve battery health slightly, because you are reducing heat and stress on the battery during use. The yellow icon is not a warning that something is wrong — it is a tool to make your battery last longer per charge.

Frequently Asked Questions

Can I use my iPhone normally with the yellow battery icon?

Yes. Low Power Mode does not prevent you from using any apps or features — it just makes them run slower. You can browse, text, call, and use social media. The slowdown is usually subtle unless you are playing games or editing video. You can turn Low Power Mode off anytime if you need full speed.

Will my iPhone automatically turn off Low Power Mode when I charge it?

No. Low Power Mode stays on until you manually turn it off, even after your phone reaches 100 percent charge. Some iPhones running iOS 17 or later have an option to disable Low Power Mode automatically at full charge, but you have to enable that setting first in Battery settings.

Is the yellow battery icon a sign my battery is failing?

No. The yellow icon only means Low Power Mode is active. It does not indicate a hardware problem. If your battery drains unusually fast even when Low Power Mode is off, that could signal an issue, but the yellow icon itself is just a status indicator.

Can I turn off Low Power Mode and still see the yellow icon?

No. The yellow battery icon appears only when Low Power Mode is on. Once you turn it off, the icon returns to the standard black or white battery symbol. If you still see yellow after disabling Low Power Mode, try restarting your phone.