To claim that we can't be certain what we know is fact, and then use that as a justification for being in god is nonsensical. You are basically implying that weak evidence is more noteworthy than strong evidence.

Voltage is not a source of energy... it is a measurement of the energy required to push an electron over a given path.

Of course our bodies have voltage, as our bodies have an "electrical system" that performs cardiac and nervous system functions, and all electrical systems have an associated electrical potential differential. But our body generates this electricity by converting energy from food, it isn't just some perpetual energy that innately exists within/as part of us.

If our body was made out of energy then the amount of energy we contain would be finite (unless you are trying to imply that the human body contains an infinite well of energy, in which case... hey the energy crisis is solved!) which would imply that we would be at risk of "ceasing to exist" if we were to consume too much of our "natural energy". This simply isn't the case.