With the decline in the prices of notebook computers, must have a lot of friends already have a notebook. The notebook for mobile tools, the overall level of performance and battery strengths and weaknesses are inseparable, is a notebook computer batteries because of the realization of the mobile office is one of the main support. It’s no less importance of the CPU, motherboard, hard drive, and other components. Following is a brief you on for the laptop’s battery every aspect of hope that we can better use the notebook computer help.
First, laptop batteries profile
The laptop battery is its flexibility and stability of the fundamental, mainstream notebook computer standard rechargeable battery system. Rechargeable battery system, including rechargeable batteries and power management systems. The battery is also reflected in notebook computers and portable exercise.
Notebook computer batteries used in three main categories: 1. Nickel-chromium batteries, 2. Ni-MH battery, 3. Lithium batteries; they generally expressed as: Ni-Cd Ni-Cd, Ni-MH Ni-MH, Li-power Li.
The first notebook computers are used Ni-Cd nickel-cadmium batteries, as battery technology was not advanced nickel-cadmium battery has many shortcomings of a headache, such as: bulky, heavy weight, small volume, short life span, memory Effects. Therefore, the current nickel-cadmium batteries have been largely eliminated, it is no longer the following details. Inspiron 1100 , Inspiron 1150 , Inspiron 1300 , Inspiron 1420 , Inspiron 1520 , Inspiron 1521 , Inspiron 1525 , Inspiron 1526
The next notebook computer began to use nickel-metal hydride (NlMH) batteries, the batteries have a better and more cost-effective power, at the same time, “Ni-MH battery is one of the most environmentally-friendly batteries, pay attention to environmental protection, a strong proponent of the use of country Ni-MH battery, for easy recycling, and environmental damage are minimal. However, lithium and nickel-metal hydride battery power, there are some shortcomings. Charging for a long time and a heavier weight, capacity than the power of small lithium batteries continue to discharge time Too short, there are memory effect, it’s not as though the memory nickel-cadmium batteries so much, but still need to discharge, the user must be exhausted before charging.
Ni-MH battery will soon be lithium-ion (Li-ion) battery replacement. Lithium power will have a long time ago, it began to use less security, often in charge when burning, burst, perhaps because lithium is too active elements because. Later, there will be a modified lithium-ion batteries by adding the element lithium can inhibit the active ingredients, so that the lithium power to achieve real security, efficiency, convenience, and Li-old has been out of power also. They are also very simple to distinguish from the battery on the logo will be able to identify, for the power lithium Li, lithium-ion battery for Li-ion. Now, the notebook used by the so-called lithium electricity, is in fact the lithium-ion battery. Lithium-ion battery energy storage density, can be recharged at any time and discharge continued for a long time and generally in about 3 hours. The size of the battery capacity from the marked mAh (milliampere hours) judgments to value, such as 3000mAh, 4000mAh, and so on, the greater the value, the greater the capacity of the battery.
Lithium-ion battery, of course, there are defects, such as higher prices and fewer charge-discharge and so on. Li-ion battery charging and discharging of 400-600, only the number of times, specially to improve the product but also a number of 800. According to charging a daily basis, the best lithium batteries but also for more than two years. The nickel-metal hydride rechargeable batteries to 700 the number of times over, some of the good quality products, charge and discharge up to 1,200 times, such a comparison, Ni-MH battery life than lithium batteries and nickel-metal hydride battery than the price of lithium batteries Much lower. In view of this, there is no perfect laptop batteries.
Common brands of laptop batteries for the vast majority of the square. The market also has a small number of ultra-thin notebooks to use cylindrical batteries, such as SONY 505 series, Toshiba PROTEGE series. Batteries based on the weight of materials and model changes, such as the shape of the same capacity with the nickel-metal hydride and lithium electricity, but the difference between a lot of weight.
From the size of the capacity of the main battery to determine mAh marked by its Chinese name is milliamperes. Milliampere-hour direct bearing on the size of the notebook’s use of time, but it can not be generalized. Battery life of notebook configurations and also has a great deal, say, for example, the HP 6100 notebook using a PIII-M, MOBILITY RADEON graphics cards and so on a number of energy-saving technology hardware, 4000mAh battery with the use of the time up to 4 hours Over. CPU desktop using the Toshiba 1800, although with a 4500mAh battery, the use of the time can only reach 3 hours. To meet the general needs to go out to work. This also indicates that the notebook’s battery life is not only about mAh, the hardware of energy-saving technology is very important.
Second, new technologies, energy-saving notebook batteries
Through battery-powered mobile office is different from the notebook computer desktop is an important feature of the limited battery capacity and can not be met, of course, unlimited use of time, increasing notebook computer’s hardware configuration of the battery consumption is also a growing The greater, and the laptop’s battery from lithium batteries are still widely used, after there have been no major breakthrough, it is necessary to meet the increasing power consumption and at the same time to ensure that the use of a certain time, then some of the new energy-saving technology is extremely important to .
The notebook computer to save the power of new technologies can be both hardware and software, software, often with the use of dedicated hardware, we have the following to tell us about the laptop’s power-saving technology.
(A) of the three types of notebook CPU power-saving technology
1. Intel SpeedStep technology
Speed Step is the use of an Intel CPU technology, the Pentium-3 600Mhz Mobile after the mobile version of the Pentium processor, Intel added a run by reducing the CPU frequency to achieve lower power consumption of technology?? SpeedStep. (Mobile Pentium M processor, Intel redesigned the technology, called “enhanced SpeedStep”) processor so that it can work in two modes to switch freely between these two modes that is, when the AC The highest performance mode (Maximum Performance Mode) and the battery when the battery optimized mode (Battery Optimized Mode). The so-called model is the highest performance when the notebook computer with the AC power connector, and can provide performance similar to the desktop; and battery optimization mode refers to when the laptop battery, the laptop’s performance will play its battery life of To achieve the best balance between. SpeedStep technology, such as the use of the 650MHz and 600MHz processors, when they are the highest performance mode, can provide 650MHz and 600MHz operating frequency, and battery-optimized mode, the processor’s operating frequency is 500MHz.
Mobile Pentium Ⅲ or Pentium4 chips are used dynamically adjust the frequency and voltage switches SpeedStep technology, which allows them to work at a higher frequency and optimization of energy between the battery switch. Notebook computer system BIOS of the CPU through the registration ID tag that has a CPU features SpeedStep, in determining whether the laptop is used after the AC power supply, BIOS and the CPU will give directions to ASIC, and run it in the appropriate mode , All of which will be completed within 500μm.
In fact, for the user, if not on the loading platform of the new chart, SpeedStep technology is almost invisible. But in the background, SpeedStep technology really take a run at a higher speed and longer battery life to strike a balance between the responsibility. In order to enable users to understand the current state of work, Intel’s platform set up in a flag-shaped icon to show the way to operate. In the absence of special circumstances, unless the use of battery-powered, SpeedStep power-saving system, the use of non-default mode. If you want custom settings, the user can control panel in Windows power management features to achieve this project.
Now, SpeedStep technology has been developed to a second-generation, known as Enhanced Intel SpeedStep technology. The new technology has increased the automatic mode, super-performance models, optimizing battery performance mode, and so on. Inspiron 1720 , Inspiron 1721 , Inspiron 4000 , Inspiron 4100 , Inspiron 4150 , Inspiron 500m , Inspiron 5100 , Inspiron 510m
2. AMD PowerNow! Technology
This power management technology based on the needs of different applications, upward or downward adjustment of the processor voltage and frequency, so that the processor is more in line with the needs of practical applications in order to extend notebook battery life and extended battery Life.
AMD PowerNow! Technology to provide work models have 3: automatic mode (the system to monitor the application and make adjustments as necessary), high-performance model (processor with the highest frequency and voltage to run) and power-saving mode (to processors The lowest frequency and voltage operation, extended battery life). However, the mode of operation will depend on how many different types of notebook computer manufacturers design.
3. LongRun technology
Transmeta’s LongRun technology is the development of the power management technology, which is characterized by low power consumption, available to the processor is just enough voltage. The principle is to use the procedure to monitor the CPU is idle, is idle if it will lower the voltage and frequency to meet different needs.
4. 3 of the above power-saving technology comparison
As can be seen from above, the 3 kinds of CPU power-saving technology works more or less the same, the CPU is idle to minimize power consumption, the difference is mainly concentrated in 3 kinds of technology, the number of mode, power consumption and the actual performance Impact.
Clearly, Intel’s SpeedStep technology provides 4 modes, is the highest among the three. However, the number is not working, the better. As a model by other modes to take a certain amount of time, and the conversion model will consume CPU resources, so the number of working should be good enough.
Power, 3 power-saving technologies that are in the normal state of CPU can be maintained at less than 2W power consumption low. One, Transmeta’s technology IongRun using the CPU power consumption as low as 0.1W, it is very prominent, but the performance of Intel and AMD have lost the same level of the CPU.
AMD PowerNow! And Intel SpeedStep power management technology in the same regardless of the former on the effectiveness of Athlon4CPU than SpeedStep technology PentiumIII-MCPU more. Athlon4 processors because of greater heat, so at the appropriate time to allow a break CPU can contribute to the heat.
B) a dedicated power management chips and a dedicated power management program
In order to maximize energy savings, leading technology manufacturers to develop a dedicated power management chips and a dedicated power management procedures,
1. IBM’s chip-specific power management and procedures
IBM Corporation in its Pentium Ⅲ CPU-level notebook computer equipped with IBMPowerManagementDevice (referred to as IBMPMDevice) dedicated power management chips (need to install special drivers to use). The combination of chips used in power management program is BatteryMixer, included in the IBMConfigurationUtility of it. The installation process will be in the system tray was placed horizontally on the right side of a battery, click on the battery will be a large number of options.
BatteryMixer in China, IBM has provided many of the themes of the original settings for different applications, users can define their own new theme to fit specific needs. BatteryMixer can even detect the capacity of the rechargeable battery, charging and discharging automatically determine the number and status of the battery if the battery state of the poor will be sent to remind users to IBM maintenance.
As a result of their special design power management chips, BatteryMixer procedures and even the power and PCI bus speed CD-ROM can be adjusted to reduce this power,.
2. Toshiba power management program
Toshiba’s power management program known as the PowerSaverUtility, this high-handed procedures in the installation will completely replace the Windows built-in power management, when the user tries to access to the standard Windows power management procedures should be warned that Toshiba will own PowerSaverUtility (from Windows “Control Panel” in the choice).
Toshiba’s custom to PowerSaverUtility powerful known, even the battery down to varying degrees when the options are different.
In addition, users can define themselves in power down to a certain percentage of the time since the issue of the definition of the voice of the emerging message or start a program, it’s very scientific.
3. SONY power management program
SONY procedures PowerPanel power management interface was fine and that the human need to SONY with the JogDial (to-point) devices and a special chip to use SONY NotebookSetupDevice hardware.
The use of PowerPanel, users can define their own different themes to suit their needs. The battery is full and exhausted when, PowerPanel be humane message (can be customized). PowerPanel in control, SONY laptop screen brightness when the switch is not like other brands? Level of a jump, but gradually brightness.
If the notebook computer installed in the second battery, PowerPanel allows users to set up the first piece of what used batteries, and can switch at any time. Inspiron 5150 , Inspiron 5160 , Inspiron 6000 , Inspiron 600m , Inspiron 630m , Inspiron 6400 , Inspiron 640m , Inspiron 700m , Inspiron 710m
In addition, PowerPanel internal battery can also read recorded information shows that the current rechargeable battery capacity and number of charge
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