1.5v battery for valve radios?

[boater sam]

Having read about the use of filament batteries and the requirement of a 1.5v cell, I note that the best advice given is to use D or the old U2 size cells in alkaline.
It is difficult with mains battery eliminators to be sure that the filaments are never over run.
Just a thought, are the huge cells that were used in gas lighters still available or did Noah have the last one? They had a large screw thread on the top with centre + contact.
I am sure they were a single dry cell i.e. 1.5v.
They would last well as they were designed for heavy current drain.
I did have a couple of leclanche cells but they disappeared.

[Refugee]

Were those gas lighters only good for coal gas?
I am pretty sure that natural gas needs a true spark to get it going.

[tiv48]

I remember them well they had a screw in element the size of a torch bulb.
I have done a google search but can find no images .
PS. 2x D cells last a long time in sets that use D series valves, so from a cost point of view and the fact they fit in the original box its the way to go.
Rob T