[mediaqueries] battery life and screen type

Have battery life and screen type been considered as potential media
queries? If possible, one could check the battery remaining and screen
hardware of the current device being used to access their content.
For example, if I could see that a user was at (low-battery) and their
screen type was (amoled) I could take advantage of their amoled screen and
adjust my css to display a primarily black layout to conserve their
remaining battery power.