No, actually I did not. You choose an acid solution and I chose a basic one. That is the difference between yours and mine. It just a matter of choice. No, it is eight electrons.
Lets work in moles because that is a practical unit.
So, you are off by 1000. The voltage of our methane fuel cell will be 1.06V per cell. Just like a car battery. No, like potential. Similar to gravational potential, or potential energy.