See 18, Understanding Networks, for the scoop on dial-up networking and Ethernet in Software

Create PDF 417 in Software See 18, Understanding Networks, for the scoop on dial-up networking and Ethernet

See 18, Understanding Networks, for the scoop on dial-up networking and Ethernet
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16: Portable Computing
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Most portable PCs come from the factory solidly built and configured Manufacturers know that few techs outside their factories know enough to work on them, so they don t cut corners From a tech s standpoint, your most common work on managing and maintaining portables involves taking care of the batteries and extending the battery life through proper power management, keeping the machine clean, and avoiding excessive heat Everything you normally do to maintain a PC applies to portable PCs You need to keep current on Windows patches and Service Packs, and use stable, recent drivers Run Check Disk with some frequency, and definitely defragment the hard drive Disk Cleanup is a must if the laptop runs Windows XP That said, let s look at issues specifically involving portables
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Manufacturers use three different types of batteries for portable PCs and each battery type has its own special needs and quirks Once you ve got a clear understanding of the quirks, you can usually spot and fix battery problems The three types of batteries commonly used in mobile PCs are Nickel-Cadmium (Ni-Cd) , Nickel-Metal Hydride (Ni-MH) , and Lithium-Ion (Li-Ion) batteries Manufacturers have also started working with fuel cell batteries, although most of that work is experimental at this writing
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Ni-Cds were the first batteries commonly used in mobile PCs, which means the technology was full of little problems Probably most irritating was a little thing called battery memory , or the tendency of a Ni-Cd battery to lose a significant amount of its rechargeability if it was charged repeatedly without being totally discharged A battery that originally kept a laptop running for two hours would eventually only keep that same laptop going for 30 minutes or less Figure 1625 shows a typical Ni-Cd battery To prevent memory problems, a Ni-Cd battery had to be discharged completely before each recharging Recharging was tricky as well, because Ni-Cd batteries disliked being overcharged Unfortunately, there was no way to verify when a battery was fully charged without an expensive charging machine, which none of us had As a result, most Ni-Cd batteries lasted an extremely short time and had to be replaced A quick fix was to purchase a conditioning charger These chargers would first totally discharge the Ni-Cd battery, and then generate a special reverse current that, in a way, cleaned internal parts of the battery so that it could be recharged more often and would run longer on each recharge Ni-Cd batteries would, at best, last for 1000 charges, and far fewer with poor treatment Ni-Cds
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Mike Meyers CompTIA A+ Guide: Essentials (Exam 220-601)
were extremely susceptible to heat and would self-discharge over time if not used Leaving a Ni-Cd in the car in the summer was guaranteed to result in a fully discharged battery in next to no time! But Ni-Cd batteries didn t stop causing trouble after they died The highly toxic metals inside the battery made it unacceptable simply to throw them in the trash Ni-Cd batteries should be disposed of via specialized disposal companies This is very important! Even though Ni-Cd batteries aren t used in PCs very often anymore, many devices, such as cellular and cordless phones, still use Ni-Cd batteries Don t trash the environment by tossing Ni-Cds in a landfill Turn them in at the closest special disposal site; most recycling centers are glad to take them Also, many battery manufacturers/distributors will take them The environment you help preserve just might be yours or your kids !
You must use disposal companies or battery recycling services to dispose of the highly toxic Ni-Cd batteries
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