Bought the same type OHL lights, and broke one in assembling the kit, it just fell to pieces while putting the cover on, so it became the teardown model. It has a single AA NiCd cell in it, and little else. I am using the board with the LED as a torch to illuminate the items I look at with a hand magnifier, replacing the original incandescent lamp and 2 cells, just using 1 of the battery holders and the switch, along with an added decoupling capacitor. I did not install the solar cell, just left it not connected, as I was worried of placing a magnifying lens deliberately in the sun. I will have to replace the single AA primary cell every year or so when it runs down.