Laptop are likely to find online friends, many laptop batteries of electricity will use more and more less. Some also specially to the professional information, doubt is quality problem. In fact, appear this kind of problem is normal.
To explain this problem, must from the structure of the battery. Before we understand the basic structure of the battery, laptop battery is composed of batteries and management chip. Batteries, battery storage “warehouse”, management chip computing power and charging and discharging process. Lithium batteries play a role of main element is, this is an active element, in order to ensure safety, can only exist as ionic state in the battery. Lithium-ion battery batteries shape just like batteries, laptop batteries, but do tend to be in groups. We often see the “quad”, “” six core battery is refers to some electricity.
Batteries, means that the capacity is big, high capacity battery cell number is generally at about eight. When it comes to batteries group, leading group of batteries, battery to reduce the “culprit”. Each cell batteries in the group, its quality and discharge level is not the same. After discharge, in order to keep voltage stability, management chip detects that the worst of the batteries for charging protection. This in the past, often the whole battery power will gradually reduce. Appear this kind of phenomenon after can use battery calibration function, this function may be more balanced battery burden “work”.
Here should be mention battery measurement methods, there are four common methods, used several methods but in general are comprehensive, for one of the main calculation method, the auxiliary calculation way to realize power calculation, management.
First is open circuit voltage measurement method, this method is by measuring the voltage of the battery in the stationary state values to calculate the residual capacity of battery, but due to the lithium ion battery still belongs to the nonlinear relationship between voltage and residual capacity, so the measured value of this method is not accurate, the vast majority of mobile phone batteries with this calculation method;
The second call coulometer algorithm, this method is by measuring the battery charging and discharging current, the current value and the time value of the product after integral calculation of battery charged into the electricity and the electricity energy that is released, coulometer algorithm is a more accurate calculation method of the power;
The third kind is the impedance measurement method, it is obtained by measuring cell resistance value of battery remaining capacity;
Fourth is comprehensive look-up table method, by setting a correlation table, the parameters such as voltage, current, temperature input, you can query to get the battery remaining capacity.
But either way, when the charging management chip are following “cask principle”, will be subject to state the worst batteries for protection. So regular cell calibration can to a certain extent, protect battery and extend the life of the battery as a whole.
Laptop battery in-depth analysis，Notebook batteries，Laptop to discharge
Laptop how long charging time is appropriate for the first time, the merchant’s explanation is a must in more than 10 hours, to ensure that the battery fully activated. Although we are very careful to use our laptop batteries, laptop battery life is less and less. So how do laptop battery charging is the most appropriate?
Lithium ion battery cathode material usually has the activity of lithium compounds, the cathode is the special molecular structure of carbon. Main ingredients for LiCoO2 common anode materials, charging, and the poles of the battery in electric potential force release lithium ion anode compounds, embedded negative molecules are arranged in layers in the structure of carbon. Discharge, the lithium ions from the lamellar structure of carbon precipitation, and the anode compounds combining again. The lithium ions move to produce electricity.
Although chemical reaction principle is very simple, but in the actual industrial production, need to think about more practical problems: the anode material additives are needed to keep inflation activity many times, the cathode material of a structure at the molecular level to design to accommodate more lithium ions; Filling in between is the cathode electrolyte, in addition to the stable, also need to have good electrical conductivity, reduce the battery internal resistance.
Although lithium ion batteries have few nickel cadmium battery memory effect, principle of memory effect is crystallization, almost do not produce this kind of reaction in the lithium battery. However, lithium ion battery capacity will fall after is put in charge many times, because the original is complex and diverse. Mainly is the change of the anode materials itself, from the molecular level, is the cathode for lithium ion hole structure will gradually collapse, congestion; From the chemical point of view, is the activity of anode materials is blunt, and appear side effects to generate stable other compounds. Physically there will be the anode material peeling off gradually, and so on and so forth, all in all eventually reduce the battery is free to move in the process of charging and discharging lithium ion.
Overcharge and over discharge, to permanent damage across the electrodes of lithium ion battery, from molecular level, can be intuitive understanding, discharge will cause excessive release of lithium ion anode carbon makes the lamella structure there are stuck down, excessive charging will take too much lithium ion shoehorned into the structure of cathode carbon, and makes some of the lithium ions can no longer be released. And that’s why lithium ion battery is usually equipped with a charge and discharge control circuit.
1, see the serial number. Most laptop fuselage and battery should be with the same serial number, if the battery serial number and the serial number of the host, the laptop is likely to be replaced the battery; Another, when purchasing foreign brand notebook computer products, laptop fuselage serial number whether is the same as on laptop batteries and packaging is testing whether the product is an important basis of gray, gray to know foreign notes this can’t be at home to enjoy the quality assurance.
2, the anti-theft lock hole. If there is a mark that plugged into a laptop anti-theft lock, probably done prototype;
3, look at the bottom of the feet. If worn and dirty, used, production line of the table not so dirty;
4, watch a cooling fan. If the blade has a thin layer of dust, the instructions as to achieve more than a week;
5, the production date. Three months ago, the factory of the notebook is also sold in the market, will pay attention to. Electronic products renewal speed, can’t get a laptop for such a long time in the channel.
6, look at the keyboard. New laptop keyboard is very clean, but you don’t shine. Used laptop keyboard aperture will have dust, the commonly used several key of bright child will be ground;
7, the screw. This is not much to say? Screws were removed? Suddenly it was away!
8, the aperture. Treated refurbished laptop, aperture is generally difficult to handle, such as new, such as a laptop screen AB plane between the small aperture, such as cd-rom aperture, MODEM and PCMCIA card these interfaces inside, even if you can find the soot formation, has surely been placed for the prototype, and didn’t seal well. What? You also found that the notebook with degrease cotton silk? That still use to I ask again what should I do?
Anyhow, see the laptop is new, not to ever outside packing is opened to generalize. Open does not necessarily is not a good laptop, on the contrary, a prototype is usually the most reliable laptop. Laptop is in good condition within the packaging, to be careful identification. Choose one of the most important is careful.
First, to see appearance
Check appearance mainly pay attention to three aspects: the serial number, packaging, machine appearance.
First, carefully check whether outside the serial number of the package and the fuselage, also check whether they have been altered, by heavy stick. In addition, when switched on, want to be first into the laptop motherboard BIOS and check the serial number and the serial number of the body are consistent in the BIOS. No. 3 if there is an inconsistency, is undoubtedly “gray” or assembling goods.
The next step is to check whether the packing of the machine itself has the trace of the broken or damaged, in order to buy being used by the problems of second-hand notebook computers.
Finally, to pay attention to check the appearance of the laptop case. Key check whether the casing surface has cracks or scratches, LCD screen if there is a scratch, corrugated or bad points. Under pure red, pure black screen, LCD’s bad points can immediately become visible, generally should not be more than 3, but it is better to have a also want to change, otherwise it is easy to increase.
Second, test specifications
Carefully check whether the specifications of the laptop is in complete accord with you want of the specifications of the purchase.
Some lawless dealers commonly used gimmick is changing accessories, such as IBM’s original hard disk is replaced with Hitachi OEM disk, original USBDVD ordinary cd-rom, cd-rom is replaced with the original USB floppy disk drive is replaced with normal import floppy drive, the original memory is replaced with normal memory, or even replace original machine in energy saving CPU with ordinary desktop CPU, and so on.
Can when buy the specifications of the third party software to test the machine, check the notebook the original specifications and delivery specifications are the same. If the laptop is equipped with a DVD drive, must also read the DVD drive disc check, if it is a CD – RW, it should be tested for its ability to burn a CD.
If the product confirmed no problem, we try the more operating system operation is abnormal; Multimedia playback sound, image is normal; MO – DEM/LAN Internet access is normal; A cooling fan is normal work; The laptop mouse positioning is normal; Charging transformer is normal, and so on.
In addition, also notice carefully when buy the instructions within the specifications of the machine, as well as the accessories attached to the products, with operating system and driver, etc is the same as the manual accessories package.
Third, we should promise
A laptop is “temperamental”, so after-sales service is quite important.
When purchasing a laptop last step, don’t forget to ask for a commitment to the businessman, namely to a businessman to show the warranty certificate.
Finally, check whether reasonable guarantee of quality in all kinds of conditions, confirm whether merchants when occurrence problem of goods can be refund or a replacement, maintenance, etc., and at the same time to confirm the warranty period, maintenance sites, fixing takes time, and finally check if there is a merchant’s seal of guarantee. If companies can’t provide a formal quality guarantee and warranty certificates, so be careful to consider whether to buy the “gray market”.
Notebook computer brings us a convenient, let us fully enjoy the fun brought by the mobile office, its key lies in the battery. Battery is laptop expensive consumable, the correct use and maintenance can prolong the service life, the following Suggestions for laptop battery maintenance:
Whether to need to activate: The activation of cells actually work should have been completed in the factory, notebook battery factory of a small capacity is to avoid the loss of natural bring damage to the battery.
How to properly charge: Ni-mh battery memory effect obviously, li-ion battery memory effect relative to the nickel metal hydride. We don’t need to wait for electric light to charge completely, the battery is lower than 3% when charging, although memory effect exists objectively, but compared to natural wear and tear have nothing.
Whether you need to remove the battery when using external power supply: It depends on when you are in the use of the power converter is needed to recharge the battery, battery charge number is directly related to life, usually a lithium battery charge and discharge times are fixed, charge number is only 500 times or so commonly, also won’t more than 800 times. Each of us to charge their batteries, accordingly, has reduced the number of a rechargeable. But many notebook makers are now considering to the battery’s vulnerability, increase the protection of battery technology, in does not meet the certain conditions will not charge. Even so, when you long time using the power converter is proposed to remove the batteries, because the temperature is also one of the bane of the battery, notebook computers in use will produce certain high temperature, the battery is very harmful. If you are not sure about your battery, of course, I still suggest that you put your battery pull down again using an external power supply.
Summary：Google said: “Google attaches great importance to the security of user data. We are in accordance with the public to the government of some data, and will review this requirement very carefully.”
According to foreign media reports, including apple, Google (microblogging), Microsoft, Facebook, nine companies were accused of participation in government spying program, they revealed a large number of users information to the government. Public response immediately, but the company denied participation in such a plan. As to the truth how, we can only wait and see.
Tonight a bombshell that nine well-known high-tech companies deliberately user information to the United States.
According to the report, this is known as a PRISM’s plan involves nine companies is: Microsoft, yahoo, Google, Facebook, PalTalk, AOL, Skype, YouTube, apple.
Apple, Google, Microsoft and Facebook have already responded to deny to participate in the program.
Apple MacBook 13 inch A1278 battery
According to a report in the first quarter of this year to sell mobile phones has 50% of the smartphone, the figure is about 40% in the whole year of 2012.
Ericsson, the latest, according to the flow rate and the market data report global smartphone users has exceeded 1.2 billion, is expected to reach 4.5 billion by the end of 2018. Benefit from the growth of LTE, by 2018, LTE will cover 60% of the world’s population.
In the first quarter this year smartphone shipments of 210 million
Sell mobile phone, according to a report in the first quarter of this year, 50% for smartphones, the figure is about 40% in the whole year of 2012. Smartphone shipments reached 210 million, more than 79.2 million of the 49.2 million tablet PC shipments and the sum of all the shipments.
User growth, in the first quarter this year, the global mobile phone users, compared with the same period last year increased by 8%, a net gain of 130 million. China added about 30 million users, accounting for about 25% of the net users, mobile phone penetration rate reached 84%, still below the global average of 90% penetration, just ahead of Africa and India.
Mobile broadband users, WCDMA/HSPA add about 60 million users, pure GSM/EDGE users increased by about 30 million, and LTE users increased by 20 million. Mobile broadband users are growing fast, up 45% from a year earlier, to about 1.7 billion.
Ericsson forecast that by 2018, LTE service will cover around 60% of the world’s population. Global LTE subscribers will be more than 1 billion in 2017, its momentum from a strong equipment as well as the demand for data-intensive services such as video.
Video to promote growth in data traffic.
According to the report, the data flow in the first quarter of 2012 and doubled during the first quarter of 2013, and growth is expected to 2018 12 times
Among them, video occupied the biggest share of the network data flow, and is expected to continue to maintain 60% annual growth by the end of 2018. By 2018, the video application is expected to account for 50% of the world’s data traffic.
From other applications, smart phone users spend most time on social networks – in some networks, can be as high as 85 minutes a day on average.
Ericsson’s research also found that the network performance is the first determinant of users for mobile operators to loyalty, and the second important is cost-effective.
Summary：Compared with the ‘create tomorrow with you, “Look inside” this slogan can better reflect our tradition.
Since May 2009, Intel has always been to “create tomorrow with you” (Sponsors of tomorrow) as a marketing theme, and now the company will enable new brand slogan “Look inside”, “focus on inner”) to replace the old slogan. This new marketing theme with “Intel inside” (built-in Intel) echoes mutually cooperative advertising is a project, the project was launched in 1991, since then, Intel has been cooperation with buy Intel’s chip hardware companies such as dell to carry out this project. Intel’s idea is to “Look inside” and “Intel inside” two themes can enhance each other’s persuasion.
Compared with the ‘create tomorrow with you,” Look inside “this slogan can better reflect our tradition.” Intel vice President and chief marketing officer Deborah Conrad (Deborah Conrad) said. “” Look inside” is a kind of action, ‘Intel inside’ is just tell people say: ‘hey, I’m here.’” Conrad said, adding that the new subject can “service to all our new and existing business”. And compared with the slogan “create tomorrow with your” low correlation with Intel’s existing products.
Conrad admitted that although the slogan “create tomorrow with your” within the Intel is still very popular, but in terms of building relationships with consumers has “the limit”. Recently, she says, since the old slogan has been “unable to do this have to do all things”.
In addition to change the advertising theme, Intel will also change to the advertising agency creative assignment method. In the past two years, Intel has been on trial “jump ball” (jump ball) method, which is initiated in every campaign when “roster” selected in its advertising agencies responsible for the organization. Today, Intel should restore the so-called “registered institutions” (agency of record) mode, specify the San Francisco advertising company Venables Bell & Partners as a leading creative agency.
This is commercial advertising claims: “girls should not be swayed by their society’s view, should really be about their is it what you see in our own mind.” Advertising also said that Intel “was determined to give power to any local girl through education”.
Summary: Implantation of malicious software process don’t need to mobile phone users to make interaction, so is very dangerous.
According to foreign media reports, apple’s iPhone iOS system, take extremely closed mode, but it cannot completely prevent outside attack. Us network security experts, the study found apple USB system vulnerabilities, with modified special charger, hackers can in a minute, will be malicious programs into the iPhone.
The Georgia institute of technology a security team conducted the study, research suggests that apple’s iPhone USB system exists security risks. Special charger in the connection of the iPhone a minute later, the malware can be turned into the mobile phone in the system.
The researchers pointed out that the malicious software implant process don’t need to mobile phone users to make interaction, so is very dangerous, and all of iPhone users face the risk.
Hackers can also be malware in the system is completely hidden, users will not see the new added strange application.
However, to what degree the malicious code can be run on the iPhone, it is not clear. Apple’s iOS USES a “sandbox mechanism”, will only be allowed to install and run the signed application software.
Researchers test manufacturing special charger, is based on the Linux computer BeagleBone credit card size, now the volume is relatively large, but if the hacker found value, less likely to develop the “attack” charger.
In July at the black hat security conference “, the researchers will further disclose details of apple security holes, they will also help apple loopholes in the solution.
Tumblr users complain just illustrates the yahoo in the conquest of young users in the process of the advertising on Tumblr and challenges.
According to foreign media reports, in mild bo Tumblr into yahoo door less than two weeks, yahoo put on “sponsored content” advertising has led the user’s discontent and complain. Many users believe that yahoo has ruined their community.
At the time of the company changed hands, the user feel aggrieved is not new. Tumblr users complain that it is, however, illustrates the yahoo in the conquest of young users in the process of the advertising on Tumblr and challenges.
Yahoo on Thursday announced that it will be on the Tumblr home page ads in the form of “sponsored content”. Tumblr users often they focus on the home page to view the update information of your blog. And as early as April, Tumblr has on mobile ads; After yahoo announced the acquisition of Tumblr, its advertising business will also be migrated.
Appear as people complain that there is a large number of ads on its Facebook dynamic information in a large number of promotion or information to appear on its Twitter account, also follow to Tumblr advertising complaints.
“(founder of Tumblr) infinite miss David talked about his childhood to see advertising, the ads sparked his interest in watching a movie or buy a car.” Mayer said, “he said that the current form of Internet advertising is not as good as its content. We think we should make a change. Our idea is consistent. In this regard as good some local advertising in the form of its content, let its contents appear even better, this is the goal we pursue. We hope we can create the AD itself with the television as the psychological demands of ads or movies.”
But, Tumblr users feel these sponsored content inspiring? I’m afraid that is a very controversial problem, not only for Tumblr, so it is for all platforms. But to be fair, relative to the Twitter or Facebook, people will prefer to Tumblr as private, creative platform. And you will feel a private space, the more you dislike these ads. Yahoo, hurry up to greet your new users, they can not serve.
Recent Comments