On the other hand, the Etec 1200ma cells have been able to deliver 8C continuously since they were first introduced and even higher C rates when used as burst. The great part about the Etec cells is that they deliver over 90% of their capacity when used at these high rates. The Kokam 1200HD cells at 8C or even 5C will only deliver about 50% of their capacity at those rates. That is why the Etec cells have become so popular with e-flyers. They deliver more of their capacity under heavy loads. Since the Kokams only deliver 50% capacity, you will get longer flight times by using the Etecs. This has been documented several times in various graphs and reports that have been posted elsewhere.

And then there are the recently introduced Thunder Power lipo cells that may exceed even the Etec cell specs, as they are being tested by several well known e-flyers who are reporting excellent results. The Thunder Power cells are just now becoming available from online vendors and were designed for R/c to replace some of the commonly used nimh and nicad packs as they are similar in size but much lighter. Recent reports have stated that they retain a higher voltage under load than the Etec cells.

Since this thread is about Li-Polys in general, I thought it would be best if all the lipo manufacturers were respresented.