Did you look at the thread I linked to? You can also look at the spec. sheets and see if you can find anywhere in any of them that the case is tied to the positive terminal of the cell. Measure the current between the cell negative and the case and tell us what you see. @upnorthandpersonal shorted the cell negative and the case and nothing happened. It might be best to refer to it as leakage current...I don't know. When I get a chance I will test for myself and report back.Leakage voltage? That would be a short. I've heard of current leakage but that's different. The voltage I read was full cell voltage at the case. I can't find a good picture of the construction online. I'm thinking that when the cell is built the cathode is on the outside and touches the case. Either that or it is an intentional physical connection. I can do a low amperage test. It would be interesting to do a high amperage test on a battery nobody cares about. Might be a cool video too.