Communication and expansion

Article Abstract:

Portable computers are designed to be attached to computer networks and telecommunication networks or linked to peripherals such as printers. Every portable computer has expansion slots that allow for the plugging in of expansion boards or add-on cards to enhance its capabilities. Most portables have communication ports that connect with external devices, including modems, external floppy disks and printers. Communicating over long distances is possible via a modem which converts digital information into an analogue form suitable for transmitting through the Public Switched Telephone Network.

Telecommunications systems

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Power

Article Abstract:

Most portable computers are designed to run on both mains and battery power. These computers come with an external mains adaptor that also recharge the battery. Batteries are normally inside the computer and are commonly available as Nickel Cadmium or the newer Lithium-ion, which are more efficient than NiCad batteries and have a longer life. However, Lithium-ion batteries, used by Dell and Toshiba, are made by just two companies and there is a supply problem. Many portable computers have built-in power management features that help to lengthen battery life.

Energy use

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What price portability? (portable computers)

Article Abstract:

Battery life is a critical factor in determining notebook portability and batter technology is becoming more efficient and lighter. Batteries are usually fitted internally. Nickel metal hydride (NiMH) batteries replaced Nickel Cadmium (NiCad) batteries, but are fairly heavy and there are concerns about their safe disposal. Lithium-ion (Li-ion) batteries provide more energy per kilogram and weigh less than nickel batteries.

Storage Battery Manufacturing, Rechargable Batteries ex Nickel/Cadmium, Storage batteries, Nickel/Cadmium Batteries, Purchasing, Rechargeable batteries, Batteries, Nickel-cadmium batteries

Similar abstracts:

• Abstracts: Ergonomics and safe usage. Screens. (portable computers). Communications and expansion. (portable computers)

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