Is it possible to convert an electrical lamp to a battery one?

It is possible, but apparently there is not a lot of demand since I see no kits for this. Something would have to be cobbled together and it would not be pretty. I'm picturing a lot of glue, not a lot of light, and frequent battery changes.

Better to purchase a camping lantern or task light designed from the beginning to run on batteries. Not a lot of choices but there are even battery table lamps available.

If it were me, I'd just purchase a battery operated lamp rather than trying to convert one. However, there are videos on Youtube that shows you how to do it. Another idea--If you have a sunny window where you need the lamp, you might put in one of those solar lamps. Personally I have been known to hide an extension cord to get electricity to where I need it. :)

There is a way to get an outlet on that wall. There is crown molding that is specially designed to carry wire from one side of a room to the other. Check it out on Ask This Old House. https://www.thisoldhouse.com/how-to/how-to-conceal-electrical-wires-crown-molding

Thank you, Debra. Unfortunately none of the options work, and I have looked for a lamp but very few are available. Would love to find a good source.

The cost of supplies, rewiring, and time involved it's not worth it. Cheaper to just purchase a battery power lamp. Always a way to get an outlet where you need one.

I came up with another idea. Amazon has a nice assortment of E26 base low voltage LED bulbs (same base as a standard home use lightbulb). You still did not mention what kind of lamp this is, how you use it and what wattage bulb or light output you need and that would determine which bulb to use.

I'm thinking of rechargeable power tool batteries, if you use them and if you could obtain a damaged tool to cut apart and use the socket to connect the battery. The Ryobi One+ 18volt I use would be ideal. High capacity rechargeable batteries would probably give a couple of days' lighting on one charge.

thank you