Originally Posted by
Roelof
Where do you think 7.4v as a battery specification comes from? Which battery is 7.4v specified? Right, it is a 2S LiPo/Li-Ion battery where the nominal voltage of a cell is determined at 3.7v. So yes, if electronics are specified for 7.4v then they wil work on a full charged 2S LiPo.
ESC BEC voltages tend to range between 6V and 7.4V. That's not just a nominal, that's a peak. Servos rate their operating voltage range, if they specify up to 7.4V they're not rated for 8.4V. The servos I tend to use, SRT 6012, have an operating voltage range between 6V and 7.4V. And not all servos are rated for 7.4V in the first place.