When cellular redox reactions pack protons closely together, they too stand at the ready waiting for the chance to rush away from their enforced companions. Cellular redox reactions thus charge up biological proton-based batteries. In fact, because the protons are all clustered on one side of an extremely thin membrane (just a few dozen atoms wide), the electric field (the membrane voltage divided by the membrane thickness) can be enormous, upwards of tens of millions of volts per meter. A cellular bio battery is no slouch.
