RE: My Brushless MT2-18SS with Mamba Max and A123 cells
The Turbo Module just sits inline between the ESC and batteries. It has one button on it that you use to adjust the voltage to, in my case, roughly 10,11,12,13,14 volts. Some of their other packs adjust between 6.6 and 10.8 volts. This truck is more of a toy than a racer, so the adjustable voltage was a big plus.
If you can get over the negatives, mainly the proprietary charger and weird sizes, these pack are great. My 2300 packs charge to 9.9v in only 15 minutes, they have adjustable voltage, they're light, and they discharge at 30C. I believe the booster doesn't work with most other batteries because they can't handle 30C.