[broadgage]

I recall these gas lighters being offered for sale with a free 1.5 volt torch bulb so as to enable use as a torch as well as a gas lighter.
The momentary action switch was inconvenient but had the merit of preventing battery waste from forgetting to turn it off.

In the 1970s power cuts I suggested that friends and families should purchase one of these lighters and use it as a torch if lacking other light.
Torches and torch batteries were in very short supply.

Batteries that did NOT fit torches were much more readily available, and this led to other improvisations.
A screw terminal 4.5 volt "door bell battery" with an MES batten holder affixed between the terminals made a basic table lamp.

ISTR a trip to Woolworths during the power cuts when the ONLY batteries on sale were door bell batteries.
I bought a dozen, not for my own use but for grandparents and friends.

I also remember a type of Ever Ready battery not seen before or since. A very large pressed steel case with two screw terminals on top.
It contained 4 very large cells, probably the same as "FLAG" cells.
Hugely expensive, and I never saw the point of these rather than simply connecting 4 flag cells in series.