Deactivating «Hey Siri» means your iPhone won't be listening for those two words at all times, and will
likely conserve some battery life because of it.
Not exact matches
The Sony tablet is most
likely set up to turn the screen off after a specified period of time to
conserve battery life when the screen doesn't appear in use, as leaving the screen on can drain
battery life faster.
Do note, though, that Samsung sets the default resolution to 2,220 x 1,080 pixels when you first start up the phone,
likely to help
conserve battery life.