When NiMh's/NiCd's are just fully charged, their voltage increase. My 8 cell AA NiMh reaches well over 11 volts.

So be carefull with 10 cells. When fully charged, the voltage might get higher, than your TX like. And when the smokes come out, the function are gone too....

Personally, I'm using 1100 mAh's in my TX. With those, I got plenty of runtime. I never had a problem with range, nor glitching. So I prefer to be on the safe side.

But if you're having problems with runtime/range/glitching, you might try with 9 AAA. This way, it's a little more safe than with 10 cells.