> > You can't probably use the full Ah-capacity of the batteries. A normal dry > cell (ZnC) drops the voltage more or less continously during discharge, > while a NiCd have an almost flat discharge curve. According to my > experience there are always some "empty" Ah:s in a dry cell. All I really need right now is off the cuff estimates, more order of magnitude than precision. It's looking like 6 months for a pair of AA batteries is a easily reachable goal. BAJ -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu