From a current eBay listing. The leaflets are post-war as the most recent patent referred to was applied 1948 and granted 1951. The earliest number dates from mid-1939 but no indication of when production commenced.

https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=5&ND=3&adjacent=true&locale=en_EP&FT=D&date=19390522&CC=GB&NR=506062A&KC=A#

There is at least an explantion of the technology. The Varley Dry Motorcycle Battery was indeed a lead-acid type but with the acid absorbed in matting. In effect, an early version of the AGM battery but not as low maintenance.

A bit more about "dryfit" I remember them from Military portable radio equipment.

https://www.exidegroup.com/eu/en/product/sonnenschein-rail

Mark

email (option): pes.sales@btconnect.com

Those are modern Gel batteries Mark. The older type as in torches and radios were Zinc-Carbon I think? Ron

email (option): ronpier@talk21.com

Nice one Rik! Matchless used Varleys on their last couple of contracts, so still looking for one, hope Arnaud will make some, as he has the original!

I do have an NOS postwar one, but they are different as said before.

Lex

email (option): welbike@welbi**.net

I think someone will have to visit Arnaud and check that he's all right!:face_with_thermometer: Ron

email (option): ronpier@talk21.com