no if you were experiencing voltage cut or weird throttle response with both props then it might be your battery. understanding the perfect 3D prop takes some time with different applications and what not.but heres probably what your experiencing. the 12x6 gives you ok power not a lot of pull out power, where the 10x4.7 you can see your motor accel. try maybe an 11x3.8 apc. that would be more in the middle. although 10x4.7 is definately my prop of choice for a lot of the mid weight electrics. if you try an 11x3.8 and still like the 10x4.7 just test how hot the motor gets with it it might be hot but make sure it dosent hav a bad smell from it. so no un less you were experiencing the problems i stated at the top it is NOT your battey props do make that much of a difference.