RE: 50cc Setup?
I never said the K2's would not be good packs just that they are not A123's. It's kind of like if you ordered and paid for a DA and received a DL instead. They are similar and both will work just fine, but they are not the same. It is fine as long as they are represented as K2 cells.
rctom,
Did your batteries with the 2500 mah cells have A123 on the label like Tired Old Man said?