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Originally Posted by luvsrc
AWSOME video Metal Man,Is 5s 123 cells same voltage as 5s Lipo, I'm thinking of buying the 540C 7XL for my maxamps 4s lipo and my quark 125 pro,What top speed can it reach without thermalling using it on a race track?
Are they the same power with my Hacker XL motors?
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The A123 cells are rated at 3.3 volts nominal, but from my experience, they are more like 3.15 volts nominal. Depends what motor you are using, 5s2p can be faster than 4s LiPo, and sometimes not. The main benefit of them is you don't need voltage cut-off, very flat discharge profile (good for racing), and potentially 15 minute charge times (with the right supply). They are also very robust, durable, and are claimed to last 1000+ cycles, but we all know RC puts alot more stress on these batts. It has alot to do with the running temp more than the discharge rates for the A123's.
Heck, i've had mine for a year now, all summer and fall I was running a dual 820 dewalt setup in a 12 lb rally car. They are still like new, retain almost the same mah rating, and i even shorted them out a couple of times by accident.