Always-on Display: How does it affect battery life? - DXOMARK
Is the S21 Ultra battery icon on Always on Display static? Can it be set to shift intermittently like the time? Concerned about burn in/image retention. : r/S21Ultra
Does Always-On Display drain the battery? – ProVsCons
What is Always-On Display (AOD) and how to enable it? | Samsung New Zealand
Always On Display draining your Galaxy phone battery? Here's a tip to deal with it - SamMobile
How To Change Always On Display Clock On Galaxy S21 / S21 Ultra - YouTube