I still can not see any big $avings with purchasing the Power Wing lipo batteries? I can always get a Turngy or Rhino 20, 30 or 40c lipo from Hobby City that is just as reliable as a FullyMax or Thunder Power, and still half the cost, even with the included overseas shipping! Best of all, after 30 days, if anything goes wrong with these batteries, I can always return them back to Hobby City for an exchange or full refund.