Variable voltage portable power supply

I have electricity, nothing is on fire, nearby politics are stable, and nothing nearby has exploded recently.

Each of these things has been not true for me at various points, so I took advantage of this quiet period to expand the utility of the LiPo RC battery I always keep charged as an emergency power source by building this variable output power supply.

Beyond it's utility as a tool, 24 watt-hours is a lot more than nothing when the power cuts, and I can connect most power sources to it including small solar arrays, and most types of battery.

I hope it is not as useful to you as it is to me!