Here is the wet NiCd starting celllI picked up in 1983 for use around the test stand. Still going strong at over forty years old. It replaced a similar wet NiCd that was made in 1946. I bought that one in 1965 as Military Surplus at the Surplus store. It too was going strong when I forgot and left it at the field in 1983. The Kavan also goes back to around 1980 but I built a holder and added a LiPo in 2010.