Inside a solar|mains rechargeable fan | work light. (with schematic)

Every year I work on the Royal Edinburgh Military Tattoo, I get a dubious technical gift from the crew-chief Vince - who routinely travels around the world as part of his normal work.
This year the gift is a solar and mains (100V to 250V) rechargeable work light complete with integrated flashlight, area light and cooling fan.

It turns out that the circuitry was quite hard to reverse engineer because of its weirdness. But it turns out to be quite interesting and relatively efficient.

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