On the only 3 longish journeys I've made since getting the sat nav it not only runs out of charge very quickly but will not even work with the car charger. On Saturday I had a 150 miles journey to make but just when I reached the town and needed it most, the sat nav shut down apparantly out of charge. This despite the fact that it had been plugged into the car charger all the way. Couldn't get it to boot up and therefore spent almost an hout trying to find the address.
Two questions:
1 How long should the fully charged battery last, and;
2 how do I know if the car charger is working?