I was out for a few hours today while using GPS, which obviously sapped my phone's power a bit quicker than usual. Since I got my Droid about a week ago, I've yet to see the battery drop below 40%, but today it started to creep below 30% and a question that I hadn't thought of came to mind: Does the Droid have any stock low battery warnings? I'd really hate to be wandering about with my phone and have it suddenly shut off after a heavy bit of GPS use in an app that doesn't allow me to see status bar and note my low battery. Will it make me aware somehow that I'm running low and should start conserving a bit more if I'd like to continue to have a functioning phone for the duration of my adventures? If the answer is no to this, then what are my options app-wise to have such a notification? Is there a good app that will tell me when my phone is on its last legs and I should tone down the usage? Better yet, is there an app that will also shut off all unnecessary communications (Wi-Fi, 3G, GPS, etc) and limit the phone to phone calls only?