Changing just a few settings can bring some life back to your phone, but it won't bring back Mark.

Smartphones and tablets are incredibly useful, helpful, and fun, but if users have one common complaint, it's definitely battery life. If you notice you can't make it through the day on a single charge, try some of these battery saving tips:

Turn down the screen brightness.

(via Lifehacker)

Keeping the brightness turned up all the way on a smartphone screen will eat up battery life quickly. If you notice you lose power quickly, try dimming down the screen as well as turning off any auto-brightness features. You can always turn the brightness back up when you need to show off your favorite photos, like that one of you and Mark you always look at.