Portable electronic products to the laptop battery as a power source. With the rapid development of portable products, increased consumption of all kinds of batteries, and developed many new battery. In addition to all of the more familiar high-performance alkaline batteries, rechargeable nickel-cadmium batteries, nickel-hydrogen batteries, but also in the development of lithium batteries. Here are introduced on the basic knowledge of lithium batteries. This includes the characteristics of the main parameters of the model significance, the scope of application and use of attention to matters.

Lithium is a metal element, its chemical symbol for Li (its English name lithium), is a silvery white, very soft, lively and chemical properties of metal, the metal is the lightest. Apart from the industrial application of atomic energy, can produce special alloys, special glass (on a TV screen using the glass) and lithium batteries. In lithium batteries used in its powerbook battery anode.

Lithium batteries are divided into two categories: non-rechargeable and rechargeable the two. Non-rechargeable battery called the one-time, it can only be in one-time chemical energy into electrical energy and power can not be reduced to chemical energy (or reduction of very poor). The rechargeable A1078 known as secondary batteries (also known as batteries). It will be chemical energy into electric energy storage, when in use, and then converting chemical energy into electric energy, it is irreversible, such as lithium batteries can power of the main features.

Lithium batteries is the biggest characteristic of high-specific energy. What is the specific energy is «than the energy refers to the unit weight or unit volume of energy. Than energy use Wh / kg or Wh / L to that. Wh is the unit of energy, W is watts, h is the hour; kg is kg (unit of weight), L is +11 (volume units). Here cite an example to illustrate: on the 5th nickel-cadmium battery is rated voltage of 1.2 V, its capacity of 800 mAh, while its energy to 0.96 Wh (1 ª± 2 V ¡Á 0 ª± 8 Ah). The same size on the 5th of lithium - manganese dioxide battery rated at 3 V, its capacity for the 1200 mAh, while its energy to 3.6 Wh. The two batteries are the same size, lithium - manganese dioxide battery than nickel-cadmium A1148 energy is 3.75 times!

One on the 5th nickel-cadmium batteries, weighing about 23 g, and one on the 5th of lithium - manganese dioxide battery, weighing about 18 g. A lithium - manganese dioxide battery for 3 V, and the two nickel-cadmium batteries only 2.4 V. So when the battery using lithium batteries small number (to reduce the size of portable electronic products, reduce the weight), and long battery life's work.

In addition lithium PowerBook G3 battery discharge voltage is stable, wide temperature range, low self-discharge rate, long shelf life, no memory effect and pollution-free advantages.
The shortcomings of lithium batteries is expensive, so is still not widely used, mainly used in handheld computer, PDA, communications equipment, cameras, satellites, missiles, torpedoes, and other equipment. With the development of technology, process improvement and production increase, the price of lithium batteries will continue to decline, the application will be more widespread.