Another of eBay's slightly exaggerated listings. This time for a 9.9 million lumen light capable of illuminating an area 300 square meters. I mean it will... But low moonlight levels at best.

The solar panel is pretty big, but it's the type with silicon wafers laid into a plastic tray and coated with resin. I prefer the fibreglass panel backed ones, as I think this risks too much physical stress on the cells in direct sunlight.

There is a holder for two parallel 18650 cells, populated with one of indescribably low capacity. But an upgrade could be adding one or two salvaged 18650's of a more useful capacity.
You might also add a TP4056 charging and protection module for an extra layer of protection.

The circuitry is what seems to be the classic type used in these units. Absolutely minimal.

On a plus note, the case, LEDs and circuitry could be a good base for a project to make a better light or house other electronics.


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