For many Galaxy users, Always-on Display feels like a small convenience feature that stays visible without demanding much attention. The battery cost, however, is more noticeable than it first appears, with testing pointing to roughly 10% to 15% drain over a normal workday of about 14 hours.
That level of consumption places AOD in an awkward position: useful enough to keep, but not cheap enough to ignore. Even on Samsung phones with advanced OLED panels, the feature still carries a measurable power bill.
Why AOD still drains power
AOD takes advantage of OLED’s ability to light up pixels individually. Because only a small portion of the screen needs to stay active for a clock or notification preview, the feature uses far less power than a fully lit display.
Even so, OLED is not the same as an E-ink panel that can remain visible with almost no energy penalty. That difference explains why AOD continues to affect battery life, even if the impact is smaller than many users expect.
Samsung has long suggested that the drain stays below 1% per hour, dating back to the Galaxy S7 era. Independent testing by TechSpot in the same period supported that claim, and later results from DXOMark pointed in a similar direction.
What flagship testing showed
DXOMark’s comparison of 2022 flagship phones included the Samsung Galaxy S22 Ultra, iPhone 14 Pro, Google Pixel 7 Pro, and Xiaomi 12S Ultra. On the Galaxy S22 Ultra, battery life fell from 417 hours without AOD to 136 hours with AOD enabled.
That result translates to roughly 1% battery use per hour, or about 10% to 15% over a day. The figure also lined up with older findings from testing on the Galaxy S7 Edge and the Galaxy S22 Ultra under similar conditions, with the phones placed in airplane mode and radios turned off.
The pattern suggests that newer Samsung hardware has not dramatically changed AOD’s basic power profile. Even a flagship display does not make the feature close to free.
LTPO does not change the story much
Some users might expect LTPO panels to solve the issue, especially on newer premium models. In practice, the available data does not show a major shift in AOD efficiency on Samsung’s LTPO-equipped flagships.
The Galaxy S22 Ultra uses an LTPO screen that is said to reduce power consumption by up to 22% compared with standard AMOLED. That advantage helps in general display use, but it does not turn AOD into a negligible battery load.
This is why comparisons across Galaxy models are not as straightforward as they seem. More recent devices are not automatically proving that AOD has become dramatically cheaper to run.
Mid-range Galaxy phones can look different
Testing on the Galaxy A series has been less extensive than on flagship models, but the available numbers point in the same broad direction. PhoneArena once recorded AOD consumption on the Galaxy A5 at under 1%, while user reports for the Galaxy A54 also placed it around 1% per hour.
A lower-resolution screen helps explain that difference. Galaxy A-series panels use around 2.5 million pixels, compared with roughly 4.4 million pixels on Galaxy S-series flagships.
Because each red, green, and blue subpixel is controlled by a separate transistor, higher resolution naturally raises power demand. That means the exact AOD cost can vary from one Samsung phone to another.
The screen is not the only battery factor
AOD often gets blamed first because it stays visible all the time, but the display is only one part of the battery equation. A smartphone modem can draw up to twice as much power as the screen, especially when signal conditions are weak or the phone is far from a cell tower.
That makes overall battery drain more complex than a simple AOD-on or AOD-off comparison. In some situations, network load can matter more than the small clock and notification display on the lock screen.
For users who still find a 10% daily battery hit too expensive for a passive feature, Samsung and other mobile platforms offer a more conservative option. AOD can be set to appear only when the phone is touched or moved, leaving the screen dark when there is no interaction.