That is exactly, what I was trying to explain. Li-Pol batteries shows a great performance at the beginning, however and especially those that are cobalt based are losing from my experience with small drones, or aircrafts very fast on their cycle-life.Since there are no further information from the manufacturer I can just assume (maybe you can confirm that?!), that after few cycles, where the temperture raises above 40C (=104 °F) the battery loses very fast on performance.At the time I was a student and could afford a free timewe used to gather every weekend and play around with small aircrafts. We used all different types of Li-Pol from Hobby-King: Radio Control Planes, Drones, Cars, FPV, Quadcopters and more - Hobbyking Very seldom you could use those batteries after around 20-30 cycles...