I just bought this garmin 755T and when I connect it to the wall charger no matter for how long I charge ,it always says battery charging when I touch the screen. My Nuvi 660 notifies as âcharging completeâ when the battery is fully charged. Is a no notification about battery in the 755T normal? According to the manual we should completely exhaust the battery and then charge it to the full potential. But how am I going to know if its fully charged or not? Please suggest something for this problem.