I have been running a [link=http://www.fromeco.org/]FROMECO[/link] 2400 LiIon 7.4V pack ($27.50) with a FROMECO Super ReliaSwitch Voltage Regulator and Failsafe Pin/Flag switch ($47.50) on a GP Patty Wagstaff. I run 4 ea. Hitecs HS-5945MG's that draw 3mA/idle and 180mA no load, and 1 each HS-5995TG that draw 300mA/idle and 4.2 amps at lock/stall. I usually get eight to ten flights with planty power left at the end of the day.