I've noticed an issue when navigating with Google Maps. With 100% battery, when I plug in my car charger I get the green LED. If I begin navigating, the LED stays amber the entire time and will eventually run the battery down. If I stop navigating, the car charger will again fully charge the battery. Is this an issue with all Android phones or just mine (Verizon HTC Incredible, stock Froyo 2.2, original battery, Verizon car charger)?