Negative
A terminal or electrode which has an excess of electrons.

Nickel Cadmium
One of the most proven and historically most widely used rechargeable batteries. Very dependable and "robust" but contain cadmium and have relatively low capacity when compared to other rechargeable systems. Very good high rate discharge capabilities make them very popular in high drain applications such as power tools.

Nickel Metal Hydride (NiMh)
Interchangeable with most NiCd batteries, nickel metal hydride (NiMh) batteries generally deliver 10-25% greater capacity than NiCds and are environmentally more friendly than NiCds since they do not contain cadmium. Used in many wireless phone and camcorders.

Nominal Voltage
The characteristic operating voltage or rated voltage of a battery.