I've never really used the navigation app until recently. Yesterday I used it and noticed that with the phone plugged into the car charger and the battery icon showing that it was charging, the battery was being discharged faster than it was being charged. When I left my home and started up the navigation app, the phone was at 95%. When I got to my destination, roughly a 40 minute drive, the battery was at 45%. Today I tried agian after restarting the phone and using a different battery. Same results. After about 40 minutes of driving around with it on the charger and the navigation app running, it lost about 50% of its charge. Anyone else experience this?