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To turn on Low Power Mode, open Settings > Battery. On iPhone 15 and later, tap Power Mode, then Low Power Mode. On iPhone 14 and earlier, tap Low Power Mode directly. A yellow battery icon in the status bar means the mode is active—not that your battery is necessarily damaged.
Turn on Low Power Mode in Settings
- Open Settings and tap Battery.
- If you have an iPhone 15 or later, tap Power Mode, then tap Low Power Mode. On iPhone 14 or earlier, tap Low Power Mode on the Battery screen.
These paths reflect Apple’s current instructions; menu labels can vary with iPhone model and software version. Apple’s Low Power Mode support page and its iPhone guide to Power Modes describe the options.
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Turn it on from Control Center or with Siri
You can also add the Low Power Mode control to Control Center and tap it there. Apple’s support instructions describe opening Control Center by swiping down from the top-right corner, then tapping the battery control. Siri can also turn Low Power Mode on or off.
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Why the iPhone battery icon is yellow
Yellow is the status-bar indicator that Low Power Mode is on. It signals an active power setting; the color alone does not indicate a battery-health problem or hardware fault.
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What Low Power Mode changes
Low Power Mode saves power by limiting selected display, background, and network-related activity. Apple lists these effects:
- Auto-Lock is set to 30 seconds and display brightness is reduced.
- Some visual effects are turned off.
- iCloud Photos syncing is temporarily paused.
- Automatic downloads, email fetch, and Background App Refresh are turned off.
- On iPhone models with ProMotion, the display is limited to 60 frames per second.
Some tasks may take longer while the mode is active. Apple’s support documentation describes 5G behavior differently across models and versions, so it is not accurate to assume that 5G is always turned off or always behaves the same way. Check Apple’s current guidance for your specific iPhone before relying on a particular 5G effect. Apple does not give a universal percentage of battery saved or a guaranteed number of extra hours.
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When Low Power Mode turns off—and when it may turn on automatically
Low Power Mode turns off automatically once the iPhone charges to 80% or higher. Adaptive Power is a separate feature that can turn Low Power Mode on automatically when the battery reaches 20% on supported configurations. Its availability and default behavior depend on the iPhone model and software.
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