paptekusa's blog

All batteries utilize similar procedures to create electricity; however, variations in materials and construction have produced different types of batteries. Strictly speaking,

what is commonly termed a battery is actually a group of linked cells. The following is a simplified description of how a battery works.

Two important parts of any cell are the anode and the cathode. The cathode is a metal that is combined, naturally or in the laboratory, with oxygen—the combination is called an

oxide. Iron oxide (rust), although too fragile to use in a battery, is perhaps the most familiar oxide. Some other oxides are actually strong enough to be worked (cut, bent,

shaped, molded, and so on) and used in a cell. The anode is a metal that would oxidize if it were allowed to and, other things being equal, is more likely to oxidize than the

metal that forms part of the cathode.

A cell produces electricity when one end of a cathode and one end of an anode are placed into a third substance that can conduct electricity, while their other ends are

connected. The anode draws oxygen atoms toward it, thereby creating an electric flow. If there is a switch in the circuit (similar to any wall or lamp switch), the circuit is

not complete and electricity cannot flow unless the switch is in the closed position. If, in addition to the switch, there is something else in the circuit, such as a light

bulb, the bulb will light from the friction of the electrons moving through it.

The third substance into which the anode and the cathode are placed is called an electrolyte. In many cases this material is a chemical combination that has the property of

being alkaline. Thus, an alkaline battery is one that makes use of an alkaline electrolyte. A cell will not produce electricity by itself unless it is placed in a circuit that

has been rendered complete by a simple switch, or by some other switching connection in the appliance using the battery.

Designing a cell can lead to many variations in type and structure. Not all electrolytes, for example, are alkaline. Additionally, the container for the electrolyte can act as

both a container and either the cathode or the anode. Some cells draw their oxygen not from a cathode but right out of the air. Changes in the compositions of the anode and the

cathode will provide more or less electricity. Precise adjustment of all of the materials used in a cell can affect the amount of electricity that can be produced, the rate of

production, the voltage at which electricity is delivered through the lifetime of the cell, and the cell's ability to function at different temperatures.

All of these possibilities do, in fact, exist, and their various applications have produced the many different types of batteries available today (lithium, mercury, and so on).

For years, however, the most common cell has been the 1.5 volt alkaline battery.

Different batteries function better in different circumstances. The alkaline 1.5 volt cell is ideal for photographic equipment, handheld computers and calculators, toys, tape

recorders, and other "high drain" uses; it is also good in low temperatures. This cell has a sloping discharge characteristic—it loses power gradually, rather than ceasing to

produce electricity suddenly—and will lose perhaps four percent of its power per year if left unused on a shelf.

Other types of batteries include a lithium/manganese dioxide battery, which has a flat discharge characteristic—it provides approximately the same amount of power at the

beginning of its life as at the end—and can be used where there is a need for small, high-power batteries (smoke alarms, cameras, memory backups on computers, and so on).

Hearing aids, pagers, and some other types of medical equipment frequently use zinc air button type batteries, which provide a high energy density on continuous discharge. A

mercury battery is frequently used in many of the same applications as the zinc air battery, because it, too, provides a steady output voltage.

link refers:
239551-001(HP NC6000 battery)

191169-001(Capacity: 4400mAh)

240258-001(Capacity: 4400mAh)

192835-001(Capacity: 4400mAh )

289053-001(Capacity: 4400mAh )

Compaq M700 battery(Capacity: 4400mAh )

134110-B21(Compaq M700 battery )

135214-001(Compaq M700 battery)