Scientists say free apps are draining phone battery life

Scientists at Purdue University developed software to examine how many popular free smartphone apps, such as Angry Birds, Free Chess and the NYTimes, were processing power, and determined that only 10 to 30 percent of the apps' energy was used to actually run the game. Angry Birds, for instance, uses nearly 45 percent of its energy to determine a user's location and then download area-specific ads over the network connection. A quick solution to the problem? Pony up some cash and buy the app outright so that it it's ad-free and doesn't drain your battery.