I use the 6000mah Nano-Techs you've linked and TBH after a 5-minute heat they barely go below 8 volts so Julian is right, if you get these you'll be carrying a lot of fuel around that you don't need
so get some shorties if they suit whatever car you have.
It's the C-rating that governs the performance so if you were to go for some, say, 4200mah 65-130C shorties they would give you the same performance as a 6000 with the same C-rating, just less weight and runtime. I want to get some soon!
The charger looks the same as an Imax B6 which has always been good value for money, I know several guys who use them with no problems
