what voltage are you running it at? its good from 5 v to 7.4( thats a 2 cell lipo for some) you have a guarantee with amazon.
Operating voltage range: 5-7.4V Operating speed (at no load) : 0.13 sec/60 degree @5.0V
Operating speed (at no load): 0.12 sec/60 degree @6.0V
Operating speed (at no...