I don't know but I did a bunch of question asking before I bought this equipment. So just for your information per my conversation with Hitec support, Hitec doesn't recommend over 6.0 volts in there HS5955 servo or any of their other servo for that matter.

http://www.hitecrcd.com/product_file...IFICATION..pdf

I have burnt up 5 Hitec digital servos running non regulated 5 cell packs. The last two destroyed the airplanes because they locked up the control surface at full throws. After talking to Hitec support, I started using 6.0 volt regulators and I have not lost any servos.

So that is the other reason I am running regulators.

I have had a couple of switches go bad, but never a regulator not to say a regulator won't go out. However I do think the chances of something going down inline is probable so that is why I run a redundant battery system. The added weight is negligable for this size airplane and the advantages far out weigh my flying abilities, my wallet and my free time to repair and or build a new airplane just because I got to cheap to put in a backup power source.

Just my thinking on this matter and my prefernce.

Jim