I emailed Futaba about the use of batteries other than NiCDs. Here is the answer I got:

"Those servos are to be used with NiCds only. This is due to the discharge rates of the different types of batteries."

Is this just a liability issue? I ask because I've seen other posts here that say you can use other batteries.

I have some AA NiMHs that are 1800mAh. I was going to use 5 to power the Rx on my Kyosho USA-1 Nitro Crusher. I have a Venom failsafe on the 3003 servo for the throttle, and of course, the 3305 for steering.

Why won't alkalines work? What is their capacity?

I was using a 9202 for steering before and also using regular alkalines and never had a problem. Maybe I wasn't pushing the truck hard enough to see the difference between alkalines, NiCDs, and NiMHs. Hmmmmm..

Futaba believes that because of the fact that the S3305 can pull high current, that other battery technologies just aren't up to the task. NiCd cells can delier much more current than NiMH, Alkalines, Lithium, and such, so this is their preference.

Thanks for the reply and please forgive my ignorance.

So..what I understand is that a 1400 mAh NiCD AA cell has the same capacity as a 1400mAh NiMH AA cell, but the NiCD can deliver maximum current quicker??

What would the side-effect be of using alkalines or NiMHs??? Just slower response time? Less run time??

Thank you for your patient answers.

The capacity of cells listed as 1400 mAh are the same, but NiCd cells are capable of delivering much higher currents than NiMH and Alkalines. If you try to draw too much current from them, they overheat and go bad rather quickly, as compared to NiCd cells. Of course, this assumes that the leads you're using are heavy-enough to allow the current to flow without heating.

'preciate the help. Thanks.

but if only i have nickel metal i cant used? i cant connect 2 6 volt battery into my receiver? thanks diego

whath is the leads i have to use heavy duty extension whit 6 volt if i only have standar i cant used?