You are correct about the voltage output, added to that is that the amp load is shared between all the cells so you can build a bit lower than you would on a single battery deviceQuick question as im a noob with mechs. but are they all wired in parallel? Does this mean single/dual/triple battery mechs all fire at 4.2V ? so one would experience the same power of a single mech however longer battery life as the mah is just increased?