Smartphone Battery Drains a Lot Even with Dark Screen
Smartphone battery down to 10 percent? Time to turn down the brightness on the screen, right? It's a classic strategy to squeeze more juice from the battery. And it works. But that trick might be less effective than you think. Because it turns out nearly half the battery drain on a phone happens when the screen's not even on. So says a study presented at a meeting of the Association for Computing Machinery, in Portland, Ore.
Researchers eavesdropped on the activity of more than 1,500 Android phones - specifically, the Samsung Galaxy S3 and S4. They used an app they developed called eStar Energy Saver. The app logs the energy drain of the phone's apps and activities as they happen. (And you can try out eStar Energy Saver yourself, if you have an Android.)