Thanks - I have seen the headway cells before, but they are actually more expensive than the GWL 10Ah cells - rightly so, as they can handle somewhat higher currents.
I have been looking at A123 pouch cells for the same reason; those are relatively light so I could increase capacity without losing portability.
But I don't expect a very high current.
I figure that if I can get the cheapest LiFePO4 cells that can produce 20 Amps continuously I'm good. It rules out A123 cells and probably Headway cells too.
I may be wrong in this though. I'll keep an open mind.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
 lifetime FE over 0.2 Gigameter or 0.13 Megamile.
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For confirmation go to people just like you.
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