I just got back from a 6 hour round trip road trip. I figured it would be a trial by fire for my DInc as a camera and a GPS unit. As a camera, it functioned admirably. I was thrilled with it. As a GPS unit it worked tolerably except that it drained the battery even though it was plugged in the entire time. The battery was halfway dead by the time I got to my destination and after 3 hours of taking pictures, it was a 15%. I was able to turn off Bluetooth (which I would like to have while I'm driving and using the unit as a GPS of course), and automatic syncing and get it to charge somewhat while I was driving. 3 hours later, it was at 50%. I realize that GPS is a battery hog, but is it really that big of a hog? I was hoping to get to my destination with a full battery. Are all car chargers like this, or did I just get a lemon? Should I abandon my hopes of using my DInc as a GPS unit in the car?