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Author Message   Rick_oleson Tinkerer Username: Rick_oleson Post Number: 514 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Sunday, February 17, 2008 - 08:49 pm:    I don't know what graphs you've seen, David; maybe you've confused the ZA curve with the Lithiums, which have an Alkaline-like dropoff. In addition to the link that Donnie provided, here is a correct discharge curve comparison from my own website: http://rick_oleson.tripod.com/index-111.html On this graph, you will note that the ZA cell curve is almost perfectly superimposed on the Mercury curve, while the Silver cell's voltage has some visible dropoff.