So I had to make a trip today that was roughly 2 1/2 hours from home. When I travel I always have navigation going and am also usually streaming pandora. When I left my house my battery widget said 90% (it only shows in 10% increments). I decided to make tbe trip without use of my car charger just to see how the battery held up. During the trip I was pretty well split 50/50 between 3g and 4g service and when I arrived at my destination my battery widget showed 70% remaining. That's pretty dang good if you ask me. My old Tbolt would've probably need charged half way through the trip lol.