Just took delivery of 2 Zippy Compact 2200 mah 35c from HK today. Charged them and got 10 minutes hovering out of each on my Trex 450 Pro V2 on Beast X
I bought Overlander 2200 3S1P 25C sport batteries have my alarm set so they come down with 3.8 v per cell and that's on 6 min but I am only putting 700 mah back in so I am gonna extend that out a bit and see what I get.
I got zippy's they are wonderful, they lasted me years! Balanced charged them everytime. 2 eventually died, my fault I forgot to set the timer. I'm going to try the Nano Tech's 90C to replace my old zippy's. I hope the Nano's can last just as long as the Zippy's