I have a 4.8v battery pack. It's something like a 2/3 A pack it has 1400mah from NoBS Batteries. The weight is maybe 4oz total. I can get 10 flights with a fresh charge and still have juice. I've never seen the reason to go with the voltage regulator etc. I'm not knocking it, I just felt more comfortable without the reg....... I don't see why you can't get the same or similar times..... Bill