I am wrong about MaxAmps.

[Sammus]

Why don't manufacturers just give their cell internal resistance. Wouldn't that solve all these under rate over rate, no standard for C rating nonsense? I always though a cells internal resistance would ultimately determine its discharge capabilities. Could you say anything about the temperature of a pack in given conditions from the packs resistance?

Even better, why not use a charger (hyperion duo and fma 10s are two that I know of) that will tell you the batteries internal resistance, I think that would have to give you a good indication of cell quality.

edit: just notice in the pdf's above that the impedance @1khz is listed. I always thought a packs resistance would be say the average of the resistance during a discharge using V = IR. Is there some other method of testing? I also realised that those chargers measure it during charge, and say that the figure gets more accurate the longer it is charging for. any light on this?