A little drift; but I'm wondering how long does your GPS hold a charge. I had an inspection over 45 minutes away, and had it plugged in the whole way there. Then I unplugged the GPS but kept it on. By the time I hit the road it had been around three and half hours, and noticed that the GPS was off. I figured it went into a sleep mode or something, but when I turned it on it flashed low battery and turned itself off again. I've had it for over year and always kept it plugged in or turned it off when I stashed it away when I parked. I guess I just expected it to hold a charge for more than 3 and half hours. Is this the same for most brands? I have a Tom Tom. (I know it's not the best but I'm still content with it, might go with a Garmin once I recalibrate after the holidays) Frank