A galvanic battery which after discharge may be restored
to the fully charged state by the passage of electrical current through
the cell in the opposite direction to that of the discharge.
Nickel Cadmium
One of the most proven and widely used rechargeable batteries. Very
dependable but contains cadmium and has low capacity when compared to
other rechargeable systems. Popular in high drain applications such as
power tools.
Metal Hydride
An intermetallic compound or alloy in which hydrogen has been absorbed.
Also the negative electrode in the nickel-metal hydride battery.