Turned it off after a trip and everything seemed fine. Tried to turn it on a week later and nothing happens. Tried charging the battery, but the green light came on showing it was fully charged. I would ocassionally over a week try turning it on to no avail. One day I heard a noise and the 7100 came on all by itself without having been touched for several days. Screen came up showing low battery and then went blank. Tried charging again and green light will only come on for about 1 sec then goes out. Left it charging for about 8 hours and still won't come on, with or without the SD card in.

GPS - Navigon - 7100 GPS Navigator GPS Receiver