Manganese Dioxide
A primary battery (non-rechargeable) similar to that of the alkaline battery though not as strong in total energy. Available in the same size as Alkaline and Carbon/Zinc ("AA", "AAA", "C","D", 9volt) the Manganese Dioxide chemistry is noted for its ability to retain its charge while being stored at high temperatures and operates well at temperatures as low as -40°C with little loss of capacity.

Memory Effect
A phenomenon in which a cell or battery operated in successive cycles to the same, but less than full, depth of discharge temporarily loses the rest of its capacity at normal voltage levels.

Metal Hydride
An intermetallic compound or alloy in which hydrogen has been absorbed-, also, the negative electrode in a nickel-metal hydride battery.

Midpoint Voltage
The voltage of a battery midway in the discharge between the start of the discharge and the end voltage.

Milliamps
Refers to battery capacity. A 1/1000th of an amp, e.g.: 1.0Ah = 1000mAh.