Free Bird
Well, It depends on which fuselage brand you got, if you have Hirobo EC 120, then go to
www.world-of-heli.de/en/index.html they have almost all of the E-conversion kits for Hirobo Scale nitro helis. I have bought from them already two conversion kits, for my Hirobo Super Cobra and Dauphin 2. They are great and they Have a very good power pack for these scale including Brushless motor and ESC. Have a look at the site