Re: Stahl 922 help
I've used a 600+amp car batt with these models before without trouble, your choice of supply should be fine.
Do you have the endless spin slip ring for the tracks? If so, then you can't run the power supply wires through the pivot point, but rather they'll be coming out the top engine hood.
I was running two AA 2700NiMH in my 922 hoe, but only with the basic electronics, it was a tight fit on the left side... might be room for just a sound system too. One 2700 would power the hyd pump for about 40 mins, the 2nd one would last for hours running everything else.
I don't mess around with the extras. Somebody else will need to answer your Servonaut question, if the sound system will work by itself or does it need Servonaut speed control as well.
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