5G devices generally use more battery than their predecessors. In addition to the modem power requirements, more advanced components in newer phones can also be power hungry. People can also use their devices for video streaming more frequently than before, as a 5G connection could make it easier to watch shows and movies on the go.
Manufacturers can only increase the battery capacity of their phones to a certain extent, so finding new ways to make their devices more energy efficient is a must. Samsung explains that the display plane is “one of the most important components affecting the total power consumption of a smartphone”. This is why equipping the S21 with low-consumption OLED technology can “have a significant impact on the duration of use of the smartphone”.