These lights consist of a 6vdc battery, 1 pigtail, and a 6vdc lightbulb.
I think you can figure out where to get a 6vdc battery.
A "pigtail" can be purchased at most hardware stores but you will probably have to ask a clerk for them.
Ask that same clerk for a box of the (6vdc) lightbulbs THAT WILL FIT THE PIGTAIL LIGHT SOCKET!!!!!
These lights usually last for a total of 24 hrs. They will provide enough light, sitting on a table, to play a card or board game, read a book, etc. They make great night lights for young children in their room and they are perfect for lighting critical areas at night, such as the bathroom.
I also keep the yard lamps that have solar cells. If the power goes out, I break them down by remocing the exterior shells and lens, and set them on the table to provide rechargable light.
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QMC, USCG (Ret)
The best luck is what you make yourself!