At 06:39 PM 12/18/02 -0600, you wrote: > But it doesn't >make sense from a circuit's point of view: the circuit has a capacity >of 10mAh. That makes no sense.. the circuit may draw 10mA, in which case a battery with a capacity of 10mAh (at 10mA) will power it for an hour. A battery with double the capacity will power it for twice as long. If there was a timer in there, or some other kind of pathological case, well, you'd say the circuit has a "requirement" of 10mAh. When capacity > requirement you have a good situation, when capacity < requirement you have an unsatisfactory situation (PIC quits too soon, divorce, whatever). Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics