This thread was 2 years old, why the F did @
RoboChrist bring it back up??
But FWIW my Hero4 Silver battery lasts about 1:30 to 1:45 recording in 1080p 60 FPS mode. Plenty long enough for my one-way 15.5 mile commute. I have 3 batteries for it, and rotate them out (bring spare battery and memory card in my trunk bag for the trip home).