Here’s an email a user sent to our Google Group today. The bold is my emphasis:
…you could also consider getting an iPhone case with the built-in external battery to extend useage.
However, I made an 8-hour hike last October in the middle of nowhere Utah and only lost about 70% the iPhone’s battery by shutting off wifi and the G3 radio while keeping Gaia running. I also took quite a few pictures.
Definitely download the maps ahead of time.
Quite honestly, our internal tests have resulted in about 6.5 hours of battery life, but I wouldn’t doubt that higher is possible!
