Mobile technology continues to push forward at the expense of battery life. It seems as if the battery industry is moving at a turtle’s pace while everything else is in hyperdrive. We’ve been forced to rely on extra-wide extended batteries, spare batteries, and plugs galore just to get us through a heavy day’s use. From shutting down WiFi to adjusting screen brightness, we’re always looking for ways to extend the life of our batteries. Unfortunately, a study performed by computer scientists at Perdue University discovered that our desire for free apps is hurting our efforts to conserve battery. You may be thinking “Duh!” but I bet you’ll be surprised to learn that up to 75% of the energy used by free versions of Android apps is spent serving up ads or tracking and uploading user data.