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. Regards Attila -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu