Always-On Display: What It Does to Your Phone Battery

Published 2026-10-16 · Marion Phone Repair

Always-On Display (AOD) keeps a dim version of your lock screen visible when the phone is asleep — showing the time, date, notifications, and sometimes a wallpaper. It is available on most flagship phones from Apple, Samsung, and Google. The obvious question: how much battery does it actually cost you? The answer depends on your phone, the display technology, and how you configure it.

How always-on display works

AOD relies on OLED or AMOLED display technology, where each pixel produces its own light independently:

When AOD is active, only the pixels showing the time, date, and notification icons are lit. All other pixels are completely off (true black). This means the display draws power only for the small number of lit pixels
The display runs at its lowest brightness level during AOD, further reducing power consumption
Most phones drop the refresh rate to 1 Hz (one frame per second) during AOD, compared to 60 to 120 Hz during normal use. This dramatically reduces the processor and display power needed to maintain the image
LCD screens cannot do true AOD efficiently because the entire backlight must stay on even to display a few pixels. This is why AOD is limited to phones with OLED or AMOLED displays

Real battery impact

The actual battery drain from AOD varies by phone and configuration, but testing across multiple devices shows consistent patterns:

iPhone (iOS 16 and later): Apple's AOD on iPhone 14 Pro and later displays a dimmed version of the full wallpaper plus widgets. This uses more power than Android implementations that show only minimal information. Expect 1 to 2 percent per hour of additional battery drain with AOD enabled, translating to roughly 12 to 20 percent over a typical day depending on how long the phone sits idle
Samsung Galaxy: Samsung's AOD shows a clock, date, and notification icons on a black background. More efficient than Apple's approach. Typical drain is 0.5 to 1 percent per hour, or roughly 5 to 12 percent per day
Google Pixel: Similar to Samsung — minimal information on a black background. Battery impact of 0.5 to 1 percent per hour
Practical impact: For a phone with a 5000 mAh battery that normally lasts a full day, AOD might reduce your end-of-day battery from 30 percent to 15 to 20 percent. For most people this means still making it through the day but with less margin

Factors that increase AOD battery drain

Full wallpaper display: iPhones show the full lock screen wallpaper during AOD, which lights up more pixels than a simple clock on a black background. A dark wallpaper with minimal bright areas uses less power than a bright, colorful wallpaper
Many notification icons: Each notification icon on the AOD is additional lit pixels. If you receive hundreds of notifications per day, the display updates more frequently and shows more content
Widgets: Some AOD implementations show widgets (weather, calendar events, music controls). More displayed information means more lit pixels and more frequent screen updates
Screen brightness environment: Some phones have an ambient light sensor that adjusts AOD brightness based on room lighting. In a bright room, AOD runs at higher brightness and uses more power. In a dark room or pocket, it dims further or turns off

AOD settings and optimization

iPhone

Settings, Display and Brightness, Always On Display. Toggle on or off
You can disable Show Wallpaper and Show Notifications independently. Turning off the wallpaper makes AOD show only the time and widgets on a black background, significantly reducing battery drain
AOD automatically turns off when the phone is face down, in a pocket (detected by the proximity sensor), during Sleep Focus mode, when Low Power Mode is active, or when connected to CarPlay

Samsung Galaxy

Settings, Lock Screen, Always On Display. Choose between Tap to Show (shows AOD briefly when you tap the screen), Show Always (permanently on), or Show as Scheduled (active only during set hours)
Tap to Show uses the least battery because the display is off most of the time and only activates when you interact with it. This gives you the convenience of checking the time with a tap without the continuous battery drain
You can customize the clock style, which widgets appear, and whether notification icons are shown

Google Pixel

Settings, Display, Lock Screen, Always Show Time and Info. Toggle on or off
Pixel phones use At a Glance to show contextual information like weather, upcoming calendar events, and active timers on the AOD

Should you use always-on display

AOD is worth using if:

Your phone comfortably lasts through your entire day with battery to spare. If you regularly end the day at 30 percent or higher, the 10 to 15 percent AOD drain does not meaningfully affect your experience
You check the time or notifications frequently throughout the day. AOD saves you from pressing the power button dozens of times daily. Over weeks, this small convenience adds up
You use a charging stand on your desk. With a charger nearby, the battery impact is irrelevant and AOD turns your phone into a useful desk clock

AOD is not worth using if:

You already struggle to make it through the day on a single charge. The 10 to 15 percent drain pushes you into low-battery territory earlier
You do not check your phone frequently during idle periods. If the phone sits in a pocket or bag most of the day, AOD drains battery for nobody to see
You are in a situation where maximizing battery life matters — travel days, long events, or any time you will not have access to a charger for an extended period

Alternatives to always-on display

Raise to Wake: The screen turns on briefly when you pick up the phone. Available on both iPhone and Android. Uses less battery than AOD because the screen only activates when you lift the phone
Tap to Wake: Double-tap or single-tap the screen to wake it briefly. Some phones support this even without AOD enabled. Uses no standby battery
Scheduled AOD: Available on Samsung and some other Android phones. Set AOD to be active only during work hours or specific times when you actually look at the phone. Off during sleep and other idle periods
LED notification light: Some older Android phones have a small LED that blinks for unread notifications. Uses negligible battery. Not available on most current phones as they have shifted to AOD instead

AOD and screen burn-in

A common concern is whether AOD causes burn-in on OLED screens — permanent ghost images from static content displayed for long periods:

Phone manufacturers mitigate this by slowly shifting the AOD content position by a few pixels periodically. This prevents any single pixel from displaying the same content continuously
AOD runs at very low brightness, and burn-in risk is proportional to brightness and duration. The low brightness of AOD makes it far less likely to cause burn-in than normal screen use at high brightness
In practice, AOD-related burn-in on modern phones is extremely rare. Screen burn-in from navigation bars and keyboard areas during normal use at high brightness is more likely than from AOD

Battery health and AOD

If your phone battery has degraded significantly (below 80 percent of original capacity), the AOD battery drain becomes a larger percentage of your reduced capacity. A phone that once lasted all day with AOD enabled may now struggle. If you notice this pattern, disabling AOD is one of the easiest ways to extend a degraded battery through the day. For a longer-term solution, Marion Phone Repair can test your battery health and replace it if it has degraded, restoring your phone to full-day battery life with AOD and all your other features enabled.