My battery only seems to last a few hours on my nexus 4. I get an icon top left all the while saying searching for GPS, and I am at home most of the time! Also if I look at the battery usage in settings it tells me major usage is maps and I never use maps!I don't do much on the phone as use my tablet. I am just a novice here so be glad of advice please. Also I have a nexus 7 tablet and the battery on that with continual use lasts over a day. What's the difference?