I got the Droid Razr Maxx from Verizon a couple months ago. Great phone. Great battery life. Problem is, a few days ago I noticed that the battery started draining a little faster than usual (I keep most battery draining settings off, except 4G). When the battery reached 10% territory, I charged it. A few hours later I come back and the battery went from 10 to 20 percent. Charged it overnight, it just went to 50%. Do I have to shell out the cash and buy a new Droid?