http://www.oople.com/forums/showthread.php?t=37230
On paper that that should get around half an hour but will be so heavy it might be less. It also depends how you drive to DCM said he gets 12min out of 4s 5000mah with a 1700kv. Yet there are alot of people who get 15-22min with the same battery at 1800-2600kv motors. Our tracks are smaller in the state though and DCM might be on the throttle more at a big sweeping track like euro ones tend to be. Softcase isnt bad depending on your battery tray and especially your driving man. If your car is like a pinball in a pinball machine on the track, get a hard case. lol