标题: 关于笔记本的Li离子电池(转贴) [打印本页] 作者: 小糊涂神仙 时间: 2005-11-7 16:42 标题: 关于笔记本的Li离子电池(转贴) Like other rechargeable batteries, these batteries may eventually require replacement
像其他可充电电池一样,这种电池最终也将被替代。
Standard Technology 基本技术
Lithium-ion batteries pack in a higher power density than Nickel-based batteries. This gives you a longer battery life in a lighter package, as Lithium is the lightest metal.
You can also recharge a Lithium-ion battery whenever convenient, without the full charge or discharge cycle necessary to keep Nickel-based batteries at peak performance. (Over time, crystals build up in Nickel-based batteries and prevent you from charging them completely, necessitating an inconvenient full discharge.)
Most Lithium-ion batteries use a fast charge to charge your device to 80% battery capacity, then switch to trickle charging. That’s about one hour charge time to power iPod to 80% capacity, then another 2 to 3 hours to fully charge iPod, if you are not using iPod while charging. You can charge all Lithium-ion batteries a large but finite number of times, as defined by charge cycle.
A charge cycle means using all the battery’s power, but that doesn’t necessarily mean a single charge. For instance, you could listen to your iPod for a few hours one day, using half its power, and then recharge it fully. If you did the same thing the next day, it would count as one charge cycle, not two, so you may take several days to complete a cycle. Each time you complete a charge cycle, it diminishes battery capacity slightly, but you can put both notebook and iPod batteries through many charge cycles before they will only hold 80% of original battery capacity. As with other rechargeable batteries, you may eventually need to replace your battery
The length of time your battery will power your device depends on how you use it. For instance, watching a DVD will use up your notebook battery’s power more quickly than simple word processing. You can follow some simple steps to maximize your notebook’s or iPod’s battery life。
For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Apple does not recommend leaving your portable plugged in all time. An ideal use would be a commuter who uses her iBook on the train, then plugs it in at the office to charge. This keeps the battery juices flowing. If on the other hand, you use a desktop computer at work, and save a notebook for infrequent travel, Apple recommends charging and discharging its battery at least once per month。
If you don’t plan on using your portable for a length of time, for example, if you manage an iBook lab at a school that’s not in session over the summer, Apple recommends that you remove and store the battery with a 50% charge. If you store a battery when it’s fully discharged, it could fall into a deep discharge state, which renders it incapable of holding any charge. Conversely, if you store it fully charged, the battery may experience some loss of battery capacity, meaning it will have a shorter life. Eject the battery from your PowerBook or iBook and store it at the proper temperature.
Calibrating your computer’s battery for best performance
校准电池以得到最好的性能
The battery has an internal microprocessor that provides an estimate of the amount of energy in the battery as it charges and discharges. The battery needs to be recalibrated from time to time to keep the onscreen battery time and percent display accurate. You should perform this procedure when you first use your computer and then every few months thereafter.
1.Plug the power adapter in and fully charge your computer’s battery until the battery indicator lights turn off and the adapter plug ring goes from amber to green, which indicates that the battery is fully charged.
2.Disconnect the power adapter and use your iBook or PowerBook. When your battery gets low, you will see the low battery warning dialog on the screen. Continue to use your computer until it goes to sleep. At that point the battery has been sufficiently drained for calibration.
3.Connect the power adapter and leave it connected until the battery is fully charged again.
You have to fully charge and then discharge your battery only once to calibrate it. After that you can connect and disconnect the power adapter when the battery is at any charge level.
TIP: When the battery reaches “empty”, the computer is forced into sleep mode. The battery actually keeps back a reserve beyond “empty”, to maintain the computer in sleep for a period of time. Once the battery is truly exhausted, the computer is forced to shut down. At this point, any open files could be lost. Therefore, it is important that you find an electrical outlet and connect the adapter before the forced shutdown occurs.