Originally Posted by Yub, yub, cmdr!

That is correct.

A nickel metal hydride cell has two HALF-CELLS:

NICKEL for the Cathode (where reduction takes place, Ni2+ goes to Ni) and

NEODYMIUM/COBALT alloy (where oxidation takes place, they lose electrons)

the electrons from these power your car.

Now for both Nickel and the Ne/Co alloy, there is a constant known as the E*halfcell (electrical reduction potential in volts per halfcell) when hooked up to a Standard Hydrogen Electrode.

NO MATTER HOW BIG YOUR BATTERY IS the E*s remain the same!

The voltage of the battery = E*Ne/Co - E*Ni.

For NiMHs, this is usually around 1.2 V.

I hope this was clear.