I saw you did a Kickstarter so you may have this info already... anyway. I’d check out crowd supply for a maybe more “on target” audience and also the beaglebo

I saw you did a Kickstarter so you may have this info already... anyway. I’d check out crowd supply for a maybe more “on target” audience and also the beaglebone, open and perhaps easier to tweak. If the target is travelers, raid/camera sd seems a pretty good idea. Battery seems just a logistical nightmare to handle, I’d make it work with one of the various phone external batteries (assuming powerful enough).