[dick hanson]

less parts count=better reliability - -I don't use regs or expanders on any thing -
On my new little electric pattern model -using the 6100 rx - I am using 4 A123 cells . Wired such that I tap off two cells for the rx and the servos . ( I also use two of these cells for my 7000 series rx in large gas powered models )
so 14 v to the speed controller and 7.2 to the rx (both series and parallel outputs )
In actual practice -- my Whattmeter says - mildly loaded voltage is stabilized in mid upper 6v range (7.2 is fresh charged , unloaded voltage .) The cells have unreal amperage output and you just about -can not - screw em up . recharge is a wham bang thing at all the amps you can come up with. The 4 cell charger rebalances each time out so that is also not a problem. the 4 cell pack (2x2300ma) weighs about same as 4cell Lipo 4800 11 ounces and I don't need either a seperate small rx pack OR a reg. so flight length will not be as long as using LiPo but according to my bench testing - power - will be close till 2000 ma is used up . Then it's time to recharge