You just need a better charger/ batteries that can be charged at 5C Testecull.
We have a heli guy who flys with us that can charge 6x of his 6S 5000mah LiPo's in 30mins with some decent batteries and a great whack of a charger.
I charge my 1300mah Dualsky's at 5000mah easy as and its done in 12mins, not bad since run time is around 7mins for each pack.
I got a Cartronic c700 for Christmas, and it was great...for about 10 minutes!
Like this one
After that it was out of juice and youldn't charge. over the controler, or over the pc, just wouldn't charge.
So we returned it, and sadly there were none left to replace.
We'll maybe get some other one, or maybe not.