7.4V 2600MAH 2S 20C Mini Lipo:TRA Connector

I just finished testing the capacity of this battery. In no way is it 2600mAh. At a 6A load I only pulled 840mAh out when the voltage sagged to 7.2V. Extrapolating linearly this would give a 1680mAh capacity, however discharge curves as we all know do not terminate linearly. I was extremely suspicious of the 2600mAh claim on the label, as the battery is so small and light. I should have known it was too good to be true.