Fitst, figure out your expected amp dtaw.  Motocalc is a great tool for that, or you can post a thread here listing your motor/prop combo.  In general, 20C batteries are adequate for most 2M pattern applications.  However, the Turnigy Nanotechs are better batteries than the standard Turnigy's and they are rated fot almost twice as many cycles.  I've flown both and swear by the Nanotechs, so I tecommend the 25C Nanotechs.  I just wish they were available at the US Warehouse.



Rob</p>