At 12:12 PM 10/1/2009, Bob Blick wrote: >Is this a high discharge application? The internal resistance is bound >to be much higher in the AA cells, even though their capacity is higher. I don't think so - but I'm not positive. These packs are for Coastal coax wire-strippers. Basically, its a motor that spins a head that contains cutting blades set at the proper distance from the end of the cable to give the 3-level strip needed for the coax connectors I use. The blades move into the wire to cut when the head spins - they have weights that are moved by centrifugal force. Its a neat concept - I think of it as having the blades driven by a constant-current source. As the head spins, each blade cuts deeper and deeper until it hits the stop that sets the depth. Much better than the sliding adjustment used in the Xcelite coax strippers - those move to discrete depth positions and you have to start large, then keep moving the slider towards the correct position one step at a time after spinning the stripper around for a few turns. I haven't measured the motor current (I'll do that today) but I'd be surprised if it exceeds 2 or 3 amps. The other packs I'm rebuilding (the 6-cell "AA" packs) are for a Brady TLS2200 label printer. The peak current on that unit is fairly high - the printer craps out while printing if I run it from my lab supply and have the current limit set to less than 5A. The current spikes are high, but very brief. I figured the NiMh cells will work well there because the printer has such a similar current profile to some of the digital cameras I've measured - and these NiMh cells work extremely well in those cameras. Thanks! dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist