CS Electronic LiPo batteries are by far the best I have ever had. I have the 5400mAh 50/100C silver protect ones and after 25 chargings they still are total equal in data being 2S2P tough. They hold their voltage that perfect that there're just .000V to .002V difference after the 25 chargings. And that stands for both of my batteries. I really use them hard in training often driving them for 25 to 30 minutes with zero boost 10.5T. They keep their full power for at least 15 minutes even with some timing. If ever, I would select between CS Electronic and Orion. I mean I could tell you a lot but just try them and feel their power and long term performance.
BTW they are much lighter than the competition (up to 20g to other high-end LiPo batteries and up to 100g to budget ones).