Quote:
Originally Posted by Big House
I figure if you can do 8 NiMH cell @ 1.2 that equals 9.6V. A123 cells have a nominal voltage of 3.3 and 3 * 3.3 equals 9.9. I figure the .3V is not a material difference. I am going to test the 8 NiMH cells first to see. If all goes well and the motor stays in one piece, I will go with the two 3S1P in series.
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remember though, that's the nominal voltage, I don't know too much about A123 cells, but li-pos will crawl way above their nominal voltages, their nominal voltages are 3.7v per cell, but they usually end up at 4.18v at fully charged, that's almost a .5v difference, and x3
I think you'll find that A123's are pretty similar, and a 3s A123 will probably crawl much higher above it's nominal voltage than a 8s Ni-Mh pack, plus A123's and Li-Po's have much greater power density and will hold their voltage better and longer, considering all this it doesn't sound like a good idea, but, you could see what castle creations says.