>>2423951Yeah, it would take a couple days to solar charge enough to be practical. More of an emergency use or makes the battery charge last longer if you hang it on your pack. I mean yeah, plan c is having a topographic map of the area, and knowing how to use a compass. All of these things go hand in hand.
My preferred pack is Phone with redundant batteries, secondary gps device, topo maps and compass (no electronics/batteries needed.