Samsung Galaxy S4: how to double your battery life

PC Pro (blog)Samsung Galaxy S4: how to double your battery lifePC Pro (blog)DSC_1191 I love my Samsung Galaxy S4, but I don't love its battery life. Samsung advertises “up to eight hours” of active use, but when I'm sitting on the tube playing a game, and my phone is constantly searching for a mobile signal that isn't there, I ...