These batteries can charge at 8 c wich is 1/8th of a hour so 7.5 minutes from dead to fully charged so..... is that a problem?
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=17268
No kidding. What really kills me is the idea that you can put together a 1.1kWh pack for $1000 that weighs in at roughly 22lbs (out of these: N5000.10S.45). Not a bad deal for something that can deliver 15A*90C=1.35 kA bursts!