SwissMotard
The Swiss Motard
The main thing I seem to hear about GoPro is the battery life. @SwissMotard has a battery pack that I think is attached to his helmet with dual-lock. You can get Anker battery packs and run the USB lead down to your jacket pocket too. Probably a better idea when it's cold as batteries perform better when ambient.
Correct, I get about 4.5-5 hours from my setup.