How do you save battery life?

How effectively does a dark wallpaper save battery life?

• This is rumored to be a battery saving technique, but how effective is it?

• Answer:

  " A full brightness white pixel uses 5.8 times more juice than a black pixel. That doesn't mean you could ever increase your battery life by 5.8  times. That's for 2 reasons. The first is that no one spends all day  staring at a fully white screen and because no one would every want to  switch to a fully black screen! The second is that the screen isn't the  only thing using power. . .    Let's look  first at changing wallpaper. I've got no idea what the brightness of  the average wallpaper is so I'm just going to go with a 50% grey  wallpaper for the purposes of this comparison. When the grey wallpaper  is used the average pixel brightness is 47%. For the black wallpaper  it's 15%. So by changing, I've reduced average pixel brightness by 32%.  If I spent all day on the home screen I'd save . . . about 11%." Source:http://lifehacker.com/5746181/save-your-smartphones-battery-with-dark-wallpapers-and-themes You can visit my blog : http://www.techczar.in