In my experience, MaxAmps over rates their packs. Also, I've heard that there 6000mAh are not that great at all. I've used their 4000mAh and they perform like garbage for being a 20c pack, their more like a 10c pack. Since them Ive gone to TrueRc packs and have not looked back, they perform awesome, greater than advertised. You should really look into some Flightpower lipos(more or less top of the line lipo); they are top notch and are worth every penny, even if they are a little more expensive than others.

Hope this helps!

Bye