Every since learning that hitting the back button closes down the pages, and background "processes" on my lumia, I've been doing it religiously almost because I had the mindset that it will help out battery life. Well to be honest, I'm tired of doing it and its a pain in the ass, I like just hitting the home windows button. Does it really matter to battery life that much if say, I have internet explorer, messaging, phone, and mail all open in the "background"?