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<BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #ffffff">I have found the same thing with regard to Hitec digitals....they "sing". That has not appeared to result in any negative performance characteristics nor has it resulted in excessive current drain. I'm using a 1200 mah NiMH pack. I've found the Hitec digitals to be fast, powerful and accurate.</BODY></HTML>