This is the Polyquest 300mAh cell that they give the designation "20" meaning 20C. Clearly it is not capable of 20C continuous discharge, but perhaps in bursts. The cell appears to deliver more of its stated capacity at 10C and 12C than it does at lower discharge rates. However, those two tests were the first two performed and the cell seems to deliver less capacity after it is cycled several times. This can be seen by the 14C performance, which was a test performed later. I have not had time to repeat the 10C and 12C tests but would expect that when I do the performance would be in line with the 9C and 14C tests.