I am trying to get my field gear (GPS, camera light) all on AAs, not easy though, my favourite working lights are all CR123s and the same live in my pack at the moment. Looking at a Zebralight that runs on one AA and is 300lms to this end.

There are few time I see the need for field charging but those are such that it is a capacity I would like to have. Soft and roll up is my goal with it.