I recently converted my ElectriCub to brushles/lipo setup. Took out the brushed motor and put in a Great Planes Rimfire Outrunner 35-36-1200/ Great Planes Silver Series 45Amp ESC/ and a Thunder power 3cell 2100 prolite.. The flying weight with this equipment is 40 ounces.. I lost about 10 ounces from the stock setup.. The plane takes off from a grass runway with NO PROBLEM with this power system and flies at about 30 percent throttle. From what I can tell I should get about 15 minutes from the battery. The stock setup was totally worthless in my opinion. Anyway, good luck.. it's a great little flyer..