wesnewell wrote:...Besides, I like the size, weight, and flexibility of rc lipo compared to lifepo4.
I think everyone agrees with you on the advantage in size, weight and discharge rate for RC LiCo. 500 cycles is ok with you (if RC LiCo can actually live that long) but definitely not ok with me. But the main reason most people (me especially) have second thought about RC LiCo is the thermal runaway risk.
A123 (LiFePo4) is safe, has more than acceptable discharge rate and is cheaper than RC LiCo (if A123 truly has 2 to 3 thousand life cycles). The only thing it can't compete with RC LiCo is energy density. But then RC LiCo's energy density is way inferior to consumer LiCo's. It's always a compromise.