I'm happy to report that my nexus doing GPS Google maps turn by turn is NOT losing charge with the car charger. My dinc would slowly lose power over time unless I left the screen off or on 10% brightness - then it was impossible to read the screen! Happy with the GPS lock on speed, too. Even here on a very overcast and rainy day it locked on in 15 seconds or so!

Unfortunately, my data connection has dropped twice now. But then again I'm driving through rural NE PA.