My battery world

I believe that attention to the cause of development of players of China battery still remembers how, in early 2006 in a remarkable message: After the trial of care, the Beijing High Court’s new chief Battery Co. , Ltd. v. National patent review board for a final decision that the case: the trial decision error of fact, calling the main reasons the new head of claim put in place to support his appeal to quash the decision at first proceeding and the State Intellectual Property of the review decision of the Patent Board to keep the name “mercury-free alkaline New Zealand in the form of batteries”, Patent No. 01,234,722.1 utility model laptop battery patent valid. See news readers sigh of relief, thinking that this means that China and the world of the drum has an important significance in the history of mercury free button the dust has settled patent ownership of mercury in China, development of the battery without moving towards a virtuous cycle development. However, the surprise is that it started in 2002, the last nail on the controversy over the end of 2005, but it is far from over, over the next four years, always in endless continuity. 8 years, three trials, two to reverse the verdict, but ultimately not reach a conclusion, should benefit from any inventions, but until now hanging in the air, not only failed to make the company the benefit imagination, but will be a drag load of development, desolation Jiaoren Nankeyimeng can not avoid trouble.

Why a clear structure and defined as clearly understood as an important inventions will lead to so intertwined? Exactly what was hidden behind the secret hiding something? Mercury-free batteries is very important for humanity, because products containing mercury, including the threat of mercury batteries inside the health of people around the world. It is reported that a New Zealand-style micro-mercury alkaline batteries can be contaminated by water is 600,000 liters, equivalent to the amount of water, the life of a person. Although in 1995 the United States and Europe have issued a ban on the sale of mercury-containing batteries  hp 361742-001 battery , hp 371785-001 battery with relevant and clearly defined, alkaline zinc-manganese batteries can not be added to the mercury content Mercury is more than 0.0005% of the total number of cells, but because the world has no technology can produce mercury free button batteries, button cells can not allow the mercury content is more than 2% of the total mass of the battery. The export volume of China’s battery has been for several years have represented more than half the total battery international. According to international standards, in 1997, the Chinese government issued “on the limitation provisions of mercury batteries and other series of measures. The Chinese battery in a short space of two or three years, research on the adoption of technology to address mercury, zinc-free alkaline manganese batteries in question. However, the face of ever increasing amount of button cells, the world without a corresponding solution.

In other countries, more details ‘a decade in Japan and the United States, Europe and other well known manufacturers of mercury-free batteries, mercury free button cell surprised by a large number of studies. However, there are technical problems are not resolved, no one company can successfully produce mercury-free alkaline button cell, resulting in the global market has been the use of mercury-containing button cell alkaline. Coin 1 billion each year the production and use, so that China and the rest of the world, people still face the risk of mercury exposure.

The battery industry has finally come good news. Mercury button batteries free After many failures, the new Head Battery Co., Ltd was finally in 2000, the initial success. October 3, 2002, the new head of Mercury “without alkaline button cells” patents for utility models successfully authorized. To avoid problems patent in overseas markets in the first time, the company again sync the United States, Germany, Great Britain and other EU countries have requested patent number laptop ac adapter. As much time in the industry worldwide coin battery has been plagued by excessive mercury content, although many known companies in the advances in the field of research, but failed. Therefore, the first person to eat crab new Lida was in the hands of the right to speak in this industry. According to what was then considered that if the day’s production budget not only Ersanqianwan battery button, the output of a month is 7-10 million.

There is also an output for another month of billions of yuan, the new company IPO Leader, developed in one million or larger companies. Obviously, this is a huge market. At home and abroad, production is not a battery of new plays Lida company, while facing the new chief of the invention, apart from the desire of some of our competitors, there also a trace of worry: because the current New Leader has applied for a patent, it also means that the only new leader, or the right to possess the technology to master, then, in accordance with regulations, and other competitors can stay away from this part of a vast market. To obtain this piece of the market, individual offender, drilling the legal vacuum, using the system for review of patents, making the patent invalid, would eat the inventor of the patent for free. New Leader on the market soon found a large number of simulated mercury-free button batteries, and carried a large number of customers. Even more strange things to come. On the new elite has not taken steps to safeguard their own legitimate rights, violating companies blame on the national patent for a new committee on Lida patent invalid. Request to cancel the new head of patents a company in Guangdong. Cylindrical batteries that since as early as 90 years in China had realized the mercury free technology, the new leader of a button to change if the cell, but the principle has not changed is the battery capable of thinking about the field of technical staff in general and to technology. The new head of the patent is obviously not creative.

An application has declared the patent invalid. To give in is the new leader in 2003, in March, breaking the head of the company hired the person in charge to meet the new leader. The stress required to share the patent with the new leader, otherwise the patent invalid, the technology to become public knowledge, which means that any company can be involved in this market. “Your patent is an antique vase, it is valuable antiques, you cooperate with me, deliver me half the dell ac adapter value of antiques are still, you still have the half, but if co-owned with my I can read this old broken, it is not worth a penny. ” Each requires the other, searches and threats of new Lida was immediately rejected as the new leader is firmly convinced that his inventions are patent law should be protected. However, the result was unexpected. In May 2004, the State Intellectual Property Office, the Patent Review Board with a new patented product Lida button cell structure and has no substantive difference between the structure and mercury-free technology alkaline manganese and cylindrical similar to the base, so a declaration of “mercury-free alkaline button-shaped batteries, patent utility model is the decision invalid. The result, the new leader of the procedure dissatisfied then to the Beijing Municipal No. 1 Intermediate People’s Court, the Patent Review Board before the courts. However test, the Court of First Instance is still valid, the Patent Review Board decided to maintain the patent invalid. Then again emphasize patent infringer people have signed an exclusive patent license for free, such as signed by the offender also have this patent, can not guarantee that the patent valid, do not sign formal nullity and void . patent holder has refused, and then press the continuation of the Beijing High Court. After the trial Attention December 20, 2005, the High Court of Beijing made final: it removes the decision at first instance and the State Intellectual Property the reconsideration decision of the Patent Board to keep the name “mercury-free alkaline button-shaped batteries”, Patent No. bits patent utility model for effective 123,456,722.1.

A dramatic scene appeared in the High Court of Final Appeal decision, the offender to launch a second invalid cancel the action, but the applicant has changed the secretary of the CEO of the company. Thus, in the next three years, the new leader had to repeat the previous operation until August 22, Municipal Court of Beijing in 2008, the Higher People again rejected the Patent Review Board, as well as a popular means Beijing Court decision. China has an old saying Shibuguosan. However, it appeared to be highly persistent opponent. In 2008, the offender has repeatedly reduced to reviewing the Council’s patent invalid. Shocking in June of this year’s review of patents Council to determine the third time that the patent is invalid. Lida that the new  hp laptop ac adapter  mercury-free technologies is a unit of general staff and technology in Japan, the technical basis of unsuccessful easy to think of technology, there is no creativity, now the new leader has been the procedure Court of Beijing Municipal Intermediate People. As a gap to bridge in the world to bring the Gospel to the world of environmental protection, giving Chinese companies opportunities invention, it has been eight years of litigation marathon. Year after year, the trial should have not only failed to bring benefits to the inventor, but has become a burden at any time Jiaoren lazy. Meanwhile, in the endless litigation under the influence of business development greatly damage. Because of the adverse effects of litigation, which makes the market a new image of Lida affected more than 50% of orders were violated there, commodity prices dropped over 30%, the profit is very weak.

The new leader of the dream do not know when the list can be reached. Competitors have a new leader malicious invalid patents obtained through numerous benefits, the company seems to have been booming. In an appearance of legitimacy of the patent is invalid if one can not help but send questions: Who will protect the rights of the inventor? In this case, some experts believe that market competition is a double edged sword, bringing the vitality of the market at the same time, it also brings risks. Without the constraints of the disorderly competition will not only upset the market, and even the market will lead to disaster. And because a number of legal measures, imperfect, leading some people have a possibility of wrongdoing, to seek their own selfish desires at the expense of relationships and use coercive means to eat patent holder’s patent, really discouraging! Battery industry believe that the Chinese a world leader, a major contribution to the world technology environmental protection is a patent may be put in place to give reasons for invalidation of the decision three days leading to ownership of independent innovation of enterprises received only eight years, the patent is invalid continuation Dabu Wan, offense, unless the long-term large-scale infringement, even more terrifying is the franchise you want to eat like means triad, so we have a bright future for business development, the gradual loss of competitiveness. SIPO patent review camcorder battery， camcorder batteries done by members of the three examination days of the decision null and void, you can act against each other with the Court, but the departments do not fit to be checked, and now there is corruption in society, Culture, hope that the central leaders of the State Council will give attention to this innovation intellectual property rights have not been three days under normal conditions is invalid, Save China’s own innovative businesses.

An aroused everyone’s attention: Sony Corporation announced the six models of mercury-free alkaline button batteries (LR) of the commercialization plan, which means that Sony’s mercury-free button batteries dell Inspiron 6400 battery will be fully market.

In fact, as early as eight years ago, China’s New Leader Battery Co., Ltd battery business had been a breakthrough ahead of other countries that plagued the world’s problems, and was the first conducted a large-scale production.

Mercury batteries inside has a great harm to humanity, because the battery inside the mercury on the brain and nervous system toxin significantly interfere with the normal work of nerves, fetal or infant exposure to high doses of mercury can cause mental retardation, cerebral palsy, hearing impairment, or vision loss and so on. Even exposure to low doses of mercury, may also affect children’s healthy development, it may allow them to generate attention, action coordination, language skills, visual-spatial, and text memory problems. For adults, chronic mercury poisoning can lead to memory decline, seizures, vision loss, and the hands, feet mean paralysis, as well as fertility and the pernicious effects of blood pressure. Increasing evidence also shows that mercury exposure may increase heart disease.

And because the dell Inspiron 710m battery of a high frequency of use and universality, making the threat of mercury-containing batteries become more prominent. It is reported that a New Zealand-style micro-mercury alkaline batteries can be contaminated water is 600,000 liters, equivalent to the amount of drinking water a person’s life.

In other countries, more than a decade in Japan and the United States, Europe and other well-known battery manufacturers of mercury-free button cell mercury-free overtaken by a large number of studies. However, there are technical problems are not resolved, there is no one company can successfully produce mercury-free alkaline button batteries, resulting in the global market has been the use of mercury-containing alkaline button batteries. Button cell 1 billion each year by the production and use, so that China and the rest of the world people are still faced with the danger of mercury exposure.

While all research work to a standstill, when this problem by the new company’s break-qing Li Dade. In this regard, China Battery Industry Association and the American environmental groups have given a high degree of recognition and evaluation, considered to be the cause of the world’s great contribution to environmental protection. With the invention of this technology, China has become the world’s first mercury-free button batteries cracking problems of the country.

It is understood that the reasons for mercury button batteries, mercury is used to block the battery anode zinc cream with pieces of metal anode contact, because such contacts will produce hydrogen gas, leading to cell swelling deformation, leakage or even explosion. Early mercury button cell battery leakage problem also exists, which is affecting performance, battery life and the use of the most fatal flaw, but as early as the late 70s of last century, mercury-containing button battery leakage problems, they have been passed to the original usage of “Punch made with thin steel plate and then nickel-plated or gold,” the negative cover, replaced by a “from nickel, stainless steel, copper composite rolling made the ‘composite metal band,’” made negative cover, and other related improvement measures to be effectively controlled.

The purpose of this patented invention, is to maintain the original mercury (ie mercury) button batteries of anti-leakage performance of the same, based on mercury-free button batteries dell Inspiron 5150 battery.

The patent on October 19, 2001 by the State Intellectual Property Office to the patent application, and in October 2, 2002 announcement was authorized by the patent No. 01,234,722.1.

With the mercury-containing button cell battery usage and the growing volume of waste, waste batteries, mercury pollution of the environment becoming increasingly serious. Thus, out of need for environmental protection, button cell battery manufacturing industry has been eager to resolve the battery in the mercury problem. In this patent application, Sony, Toshiba, Hitachi, Panasonic, Seiko, etc. at the button battery R & D and manufacture of industry-leading position among the Japanese companies, are mercury-free button batteries to resolve the issue for a variety of attempts and efforts to put forward all kinds of technology solutions. All of these technical programs are committed to address the mercury-free leakage caused by the new problem, but has failed to effectively meet the mercury-free technology and anti-leakage effect of both. Therefore, this patent application until a few days ago, button cell battery manufacturing industries can in fact have not effectively address both mercury-free and also the technology of anti-leakage problem, and thus mercury-free button batteries have yet to really realize the industrialization and market access.

This patent research and development through the use of unconventional ideas, successfully resolved the distress button battery manufacturing industry for many years technical problems. Before the date of this patent application, all address the issue of mercury-free technology to improve the program, are in the existing technology base in order to mitigate the negative climbing (ie, leakage) speed commonly used by nickel – stainless steel – made of copper to suppress three-layer composite plate made of metal anode cap based on an improved, all of which improve the programs do not relate to the negative laminate cover any change in the structure itself, even in the knowledge that negative covered laminate structure forming the dislocation occurs and thus damage the coating used in its suppression of hydrogen produced by indium or tin plating and cause the battery case of the inflatable and the leakage is still only proposed many other complex “plugging” program, but did not give any regard to the availability covered by changing the negative laminate structure to solve this problem the technical inspiration.

And this patent is another way, its R & D and set aside the idea of super-normal manner by the existing technology made of three layers of metal composite plate anode covered with a laminate structure, but directly by the metal plates or sheet made of stainless steel anode on-chip “in gold, silver, copper, tin, indium and other tests and found that the negative on-chip indium or tin-plated success in controlling the battery anode zinc cream in contact with the anode film produced gas, together with the improvement of raw materials and formulations on the success of to produced the mercury-free alkaline zinc-manganese, zinc / silver manganese button-type batteries. based on the discovery, the completion of the present utility model dell Inspiron 5160 battery. ”

In this patent the technical program, in order to better in the negative on-chip indium or tin plating, and the elimination of a single coating of the pinhole prone to problems presented in this patent by iron plates or stainless steel sheet made of negative film naked on-chip first electroplating nickel or copper, made of “has electroless nickel or copper, battery anode film,” and then chip in the battery anode indium or tin plating.

The use of the patented technology, the program produced mercury-free button batteries, in 2002, that had been successful in the realization of industrial production, the product of mass entering the market, is purchasing the use of well-known enterprises such as McDonald’s, and received praise from environmental dell Inspiron 6000 battery groups about the United States, achieved a Sony, Toshiba, Hitachi, Panasonic and other multinational efforts for many years failed to achieve the technical objectives for the protection of ecological environment of mankind has made a strong contribution.

In the 863 field of new materials with the support of the Shenzhen High-Tech Green America Co., Ltd., Beijing University of Technology and other units through the production and research co-operation, broke through the resource sony VGP-BPS8 battery utilization of used batteries industrialization of key technologies, establishment of resource utilization of used batteries in the core patented technology system and standard system, the formation of annual recycling of used batteries and other waste, 20,000 tons of nickel cobalt annual output of high-performance cobalt, nickel metal powder production capacity of 2000 tons, and built a recycling technology to produce ultra-fine nickel, cobalt demonstration base powder material.

Cobalt-nickel metal is widely used in batteries, carbide, stainless steel, petrochemicals, automobile manufacturing, machine tools, etc., cobalt and nickel powders are indispensable in modern industrial metal. China is a poor state of cobalt, cobalt resources of proven recoverable reserves are 40.9 thousand tons, accounting for only 1.03% of the world cobalt resources, while the cobalt resource consumption is 12,000 tons / year or more, accounting for 25% of the world’s consumption sony VGP-BPS8A battery; Meanwhile, China is also a lack of resources of the state of nickel, has proven reserves of nickel resources of 232 million tons, accounting for 3.56% of the world, while China’s annual consumption of about 25 million tons, an annual shortfall of 10 million tons. China’s annual lithium ion, nickel metal hydride and nickel cadmium batteries more than 300,000 tons of waste, the amount of used batteries to retain more than 100 million tons of used batteries urgent need to develop resource utilization technologies. In the lithium ion, nickel metal hydride and nickel cadmium battery scrap, there is rich in cobalt, nickel metal, is an important renewable cobalt and nickel resources. The use of used batteries to produce high-end products to meet the application requirements of cobalt, nickel powder, can form a virtuous circle of resource recycling.

Grammy Shenzhen Hi-tech Co., Ltd., New Materials Jingmen Grammy Co., Ltd., Beijing University of Technology, Central South University in cooperation for a typical multi-department of waste batteries sony VGP-BPS9 battery and nickel-cobalt-waste recycling and high-performance nickel-cobalt-a study of new materials technology solve the performance restoration, revitalization and special structures forming, dismantling / classification, rapid separation and purification and other key technology and process equipment, build the failure to adapt to a variety of waste materials, cobalt and nickel recycling systems and new technology to build an area of 250,000 square meters of production base and research centers, to produce ultra-fine metallic nickel and cobalt powders, spherical nickel hydroxide, box-shaped cobalt oxide and the four spherical cobalt oxide sub-four series of nickel and cobalt powders, fully restored failure of nickel, cobalt material performance. Product cost less than the cost of the original minerals, product performance to meet the auto parts, precision machine tools and battery three different technical standards for the industry, access to national key new products and Hubei, Guangdong brand-name title, replacing some of the imported products has now met the carbide factory and part of the domestic battery industry’s needs, the annual output value reached 800 million yuan.

In the 863 Program and local governments with the support of the Grammy’s worked in Shenzhen, Hubei has established covering 20 cities, 7 million people of scrap battery recycling network, has assembled 15,000 waste battery recycling boxes, the annual recycling of 3,000 tons of used batteries above, the creation of a demonstration model sony VGP-BPS9/B battery  of waste battery recycling. Green America with used batteries and other “urban mines” Resource Recycling, failure to achieve re-use of cobalt-nickel materials, product upgrades, forming independent intellectual property rights, building a cobalt and nickel metal circular economy industrial chain. This is to promote the development of China’s circular economy and ease China’s shortage of cobalt and nickel resources, reduce environmental pollution of great significance.

Waterproof Solar Mobile

From 1959, Sharp began solar energy research, and finally to 8 million pixels solar SH936 mobile phone into a real market.

Sharp mobile phones, according to advance the cause of this Part, Junko Nakagawa said the phone solar charging panels covering the clamshell panel, rechargeable 1 hour in the sun, you can call 6 minutes, and maintain hours of standby time. Clamshell-style appearance, solar panels covered by the mirror, not only to protect the fragile solar panels, can also act as a mirror to use. At the same time, in order to allow users to better grasp the state of charge, solar panels below the status display is also equipped with a bar.

While the same card to play solar charger In addition to Sharp Solar phone charger through the sunlight, but also have the IP5, IP7 waterproof standard, though, and did not meet the “three defenses” the level of mobile phones, but the water can easily cope with everyday life. At the same time, support for mobile TV functionality, video playback is very smooth.

Drug-resistant lithium-iron battery

July 15, from Guangzhou, the battery technology research and development enterprise-resistant one-off high-energy lithium-ion batteries available for sale. It is reported that such cells do not contain any toxic and harmful substances, a new generation of ultra-high energy of the whole green battery. Resistance when the person in charge of marketing, said Yu Han, lithium-iron battery has a high capacitance, an equivalent of seven alkaline batteries, the number of discarded batteries can be substantially reduced.

According to Yu Han introduced lithium-iron batteries are no other heavy metals, machining process does not create pollution. It has a good environmental protection, more the value of recycling, such as lithium iron can be re-used. “Lithium Iron Batteries in the international community is still cutting-edge technology, the international giant monopoly. Internal lithium iron battery breakthrough will enable consumers to spend less expensive green battery.” China’s Power Industry Association of Chemistry and Physics, LIU Yan-long, said the Secretary-General.

According to purportedly leaked abstracts on the tech rumor website Boy Genius Report, Apple is gearing up to action a alternation of post-Thanksgiving bargains on articles from iPods to MacBooks.

The deal, allegedly acceptable alone on November 27, lists “up to” discounts of 30 percent on iPods (excluding the Shuffle and iPhone), 25 percent on laptop battery and desktops, and 15-percent on accessories, software, and added hardware.

The Boy Genius Report Web website says: “One of our connects just hit us up with some arresting Apple information. According to them, what you see abundant aloft is a attempt of apple laptop battery‘’s annual Black Friday deals. It’s appear to be something Apple will email out shortly.”

Of course, with the ambiguous use of “up to” and no specific articles listed, we can’t be abiding if these will be acceptable deals or not. But if you’re absorbed in getting the aboriginal in band to analysis them out, the leaked doc aswell says that baddest Apple food will be aperture at 6 a.m. on November 27.

There are actions you can take to make your battery last longer during each charge cycle and live longer over many cycles. HP laptop battery always recommends following the instructions for charging and storage that came with the battery or notebook. On this page we offer additional suggestions to help you get the most from your portable power supply.

Manage battery power more effectively in Windows

Make sure your battery gives the power you need, when you need it. Power Options in Windows XP allow you to control the power management features of your notebook PC.

Learn more about the Power Options in Windows by visiting Microsoft’s support site:
? Microsoft: Power Management in Windows XP
Tips for conserving battery power on notebook PCs
You can manually change the power consumption of your notebook PC and conserve laptop battery power.

Reduce the brightness of the screen to the minimum readable level. Use the Fn and F7 or F8 keys to adjust the brightness.

Remove peripherals when not in use. External hard drives, CD-ROMs, Zip drives, PC cards, and other peripheral devices can draw power from your compaq laptop battery even when they are not in active use. Disconnect them when you have finished using them.
Reduce the speed of your processor. The faster your computer works, the more quickly it uses up the supply of power. By cutting down on processor speed, you can extend the charge of your battery. Methods to reduce processor speed vary from model to model, and your manual should provide instructions for doing so.

Turn off the Wireless On-Off button when it is not in use. If your notebook has one, press the Wireless On-Off button so that the light turns off.

Battery care practices

Battery cells suffer gradual, irreversible capacity loss over time. Such aging occurs more rapidly as temperature and discharge loads increase. Here are some suggested ways to minimize the capacity loss for your laptop battery.

Store Li-Ion batteries between 20°C and 25°C (68°F and 77°F) with 30% to 50% charge.

Do not leave batteries exposed to high temperatures for extended periods. Prolonged exposure to heat (for example, inside a hot car) will accelerate the deterioration of Li-Ion cells.

Remove the battery if the notebook will be stored (turned off and not plugged into AC power) for more than 2 weeks.

Remove the battery if the notebook will be plugged into AC power continuously (via a wall adapter or docking station) for more than 2 weeks.

Note: Recommendations for battery use and storage are covered in the compaq battery User Guides for each model.

Calibrate the notebook PC battery

Short discharges and recharges do not fully synchronize the dell Inspiron 6000 battery fuel gauge with the battery’s state-of-charge. This can result in the amount of power available in one cycle being less than expected or the battery meter being inaccurate.

Under normal usage, Sony Camcorder battery should be calibrated a minimum of once every 3 months. Your battery can be calibrated by following these steps:
Step 1 – Disable the Windows Power Management
In Windows, right-click the Desktop and select Properties in the menu list.
Click the Screen Saver tab and then click the Power button.
Under Power schemes, select Always On in the drop down menu.
Under Settings for Always On power scheme, select Never in each of the drop down menus.
Click OK on the Power Options Properties window and then click OK on the Display Properties window.

Step 2 – Fully charge the battery
Connect the AC adapter to the notebook.
Charge the panasonic camcorder battery until the Windows battery meter is at 100%.

Step 3 – Fully discharge the battery
Remove the AC adapter.
Keep the notebook on until the battery has completely drained and the notebook automatically turns off.
Connect the AC adapter to the notebook.
Keep the AC adapter connected to the notebook until the canon camcorder battery has completely charged.

Step 4 – Enable the Windows Power Management
In Windows, right-click the Desktop and select Properties in the menu list.
Click the Screen Saver tab and then click the Power button.
Under Power schemes, select Portable/Laptop in the drop down menu.
Click OK on the Power Options Properties window and then click OK on the Display Properties window.

Is the runtime of a portable device directly related to the size of the laptop battery? The answer should be ‘yes’ but in reality, the runtime is governed by other attributes than the specified capacity alone.

This paper examines the cause of unexpected downtime and short battery service life. We look at four renegades – declining capacity, increasing internal resistance, elevated self-discharge and premature voltage cut-off on discharge. We evaluate how these regenerative deficiencies affect nickel, lead and lithium-based batteries.
Declining capacity
The amount of charge a laptop battery can hold gradually decreases due to usage and aging. Specified to deliver 100% capacity when new, the battery should be replaced when the capacity drops to below 80% of the nominal rating. Some organizations may use different end-capacities as a minimal acceptable performance threshold.

The energy storage of a battery can be divided into three imaginary sections consisting of: available energy, the empty zone that can be refilled, and the unusable part (rock content) that increases with aging. Figure 1 illustrates these three sections.

Figure 1: dell laptop battery charge capacity.Three imaginary sections of a battery consisting of available energy, empty zone and rock content.

In nickel-based batteries, the so-called rock content is present in form of crystalline formation, also known as memory. Restoration is possible with a full discharge to one volt per cell. However, if no service is done for four months and longer, a full repair becomes increasingly more difficult the longer service is withheld. To prevent memory, nickel-based batteries should be deep-cycled once every one or two months. Nickel-cadmium and nickel-metal-hydride batteries are used for two-way radios, medical instruments and power tools.

Performance degradation of the lead-acid battery is caused by sulfation and grid corrosion. Sulfation is a thin layer that forms on the negative cell plate if the battery is being denied a fully saturated charge. Sulfation can, in part, be corrected with cycling and/or topping charge. The hp battery corrosion, which occurs on the positive plate, is caused by over-charge. Lead-acid batteries are used for larger portable devices and wheeled applications.

Lithium-ion apple laptop battery lose capacity through cell oxidation, a process that occurs naturally during use and aging. The typical life span of lithium-ion is 2-3 years under normal use. Cool storage a 40% charge minimizes aging. An aged lithium-ion cannot be restored with cycling. Lithium-ion is found in cell phones and mobile computing.

Increasing internal Resistance
The capacity of a battery defines the stored energy – the internal resistance governs how much energy can be delivered at any given time. While a good battery is able to provide high current on demand, the voltage of a battery with elevated resistance collapses under a heavy load. Although the battery may hold sufficient capacity, the resulting voltage drop triggers the ‘low battery’ indicator and the equipment stops functioning. Heating the battery will momentarily increase the output by lowering the resistance.

A battery with high internal resistance may still perform adequately on a low current appliance such as a flashlight, portable CD player or wall clock. camera battery equipment, on the other hand, draw heavy current bursts. Figure 2 simulates low and high internal resistance with a free-flowing and restricted tap.

Figure 2: Effects of internal battery resistance.A battery with low internal resistance is able to provide high current on demand. With elevated resistance, the battery voltage collapses and the equipment cuts off.

Nickel-cadmium offers very low internal resistance and delivers high current on demand. In comparison, nickel-metal-hydride starts with a slightly higher resistance and the readings increase rapidly after 300 to 400 cycles.

Lithium-ion has a slightly higher internal resistance than nickel-based batteries. The cobalt system tends to increase the internal resistance as part of aging whereas the manganese (spinel) maintains the resistance throughout camcorder battery life but loses capacity through chemical reaction. Cobalt and manganese are used for the positive electrodes.

High internal resistance will eventually render the battery useless. The energy may still be present but can no longer be delivered. This condition is permanent and cannot be reversed with cycling. Cool storage at a partial state-of-charged (40%) retards the aging process.

The internal resistance of Lead-acid batteries is very low. The camera battery responds well to short current bursts but has difficulty providing a high, sustained load. Over time, the internal resistance increases through sulfation and grid corrosion.

Elevated self-discharge

All sony digital camera battery suffer from self-discharge, of which nickel-based batteries are among the highest. The loss is asymptotical, meaning that the self-discharge is highest right after charge and then levels off. nickel-based batteries lose 10% to 15% of their capacity in the first 24 hours after charge, then 10% to 15% per month afterwards. One of the best batteries in terms of self-discharge is Lead-acid; it only self-discharges 5% per month. Unfortunately, this chemistry has the lowest energy density and is ill suited for portable applications.
lithium-ion self-discharges about 5% in the first 24 hours and 1-2% afterwards. Adding the protection circuit increases the discharge by another 3% per month. The protection circuit assures that the voltage and current on each cell does not exceed a safe limit. Figure 3 illustrates a battery with high self-discharge.

Figure 3: Effects of high load impedance.Self-discharge increases with age, high cycle count and elevated temperature. Discard a battery if the self-discharge reaches 30% in 24 hours.

The self-discharge on all battery chemistries increase at higher temperatures. Typically, the rate doubles with every 10°C (18°F). A noticeable energy loss occurs if a battery is left in a hot vehicle.

Aging and usage also affect self-discharge. nickel-metal-hydride is good for 300-400 cycles, whereas nickel-cadmium may last over 1000 cycles before high self-discharge affects the performance. An older nickel-based nikon coolpix battery may lose its energy during the day through self-discharge rather than actual use. Discard a battery if the self-discharge reaches 30% in 24 hours.

Nothing can be done to reverse this deficiency. Factors that accelerate self-discharge are damaged separators induced by crystalline formation, allowing the packs to cook while charging, and high cycle count, which promotes swelling in the cell. Lead and lithium-based batteries do not increase the self-discharge with use in the same manner as their nickel-based cousins do.
Premature voltage cut-off
Not all stored battery power can be fully utilized. Some equipment cuts off before the designated end-of-discharge voltage is reached and precious battery energy remains unused. Applications demanding high current bursts push the battery voltage to an early cut-off. This is especially visible on apple laptop ac adapter with elevated internal resistance. The voltage recovers when the load is removed and the battery appears normal. Discharging such a battery on a moderate load with a battery analyzer to the respective end-of-discharge threshold will sometimes produce residual capacity readings of 30% and higher, jet the battery is inoperable in the equipment. Figure 4 illustrates high cut-off voltage.

Figure 4: Illustration of equipment with high cut-off voltage.Some portable devices do not utilize all available battery power and leave precious energy behind.

High internal battery resistance and the equipment itself are not the only cause of premature voltage cut-off – warm temperature also plays a role by lowering the battery voltage. Other reasons are shorted cells in a multi-cell battery pack and memory on nickel-based batteries.