9 Cell Battery For HP Compaq 320 321 325 326 420 421 620 621 425 625
4320t ProBook 4320s 4321s 4325s 4326s 4525s 4720s

Black - A colour which does not emit any colour of the spectrum. Black absorbs all frequencies of the spectrum.

Battery - A device used for the storage of electricity

Cm - Centimetres, one centimetre is equal to 10 milimetres

weight - A measure of the force applied on an object by gravity. Measured metric in grams and kilos or imperial in lbs and oz

Hp - Horse Power. A measurement of power. The greater the horsepower output, the more energy it produces.

Voltage - A measurement of volts.

Dimension - The shape or measurements of something.

Li-ion - A rechargable battery. Popular in portable electronics combining one of the best energy densities and not suffering memory effect. Very slow loss of charge when not in use.

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