A Work In Progress For Lithium ion Batteries Do You Know?
They weigh surprisingly little,yet they back a greater energy wallop than any other batteries of similar size. Samsung NP-R55 battery They are based on ions,charged atomic particles.In the manner of nitro glycerin,although not nearly as explosive,they are sensitive to jarring movement.But they have come,in the past two decades,a long way from the days when their lack of stability meant that they could not be trusted outside of a laboratory. Samsung R50 battery The lithium battery has entered the mainstream,and when treated with caution,do things that no other rechargeable battery can do.
Lightweight lithium metal-based batteries have been the object of research since 1912,but did not achieve commercial status until the 1970s,and like all batteries of that era,were not rechargeable.Samsung R55 battery Because lithium metal is extremely volatile,the lithium metal based batteries had to be abandoned and replaced with lithium ion based batteries before recharging was an option.Sony Corporation int5roduced the first rechargeable lithium ion batteries in the 1991,and they have now become the rechargeable batteries of choice. Samsung NP-P50 battery
The competition,nickel cadmium batteries,has only half the energy density of lithium ion batteries.Nickel batteries are also much more high maintenance than lithium ion batteries,which do not require a full discharge before recharging.Samsung NP-P60 battery And lithium ion batteries,when disposed of,are far less threatening to the environment than nickel ones.The lithium batteries,however,are not without their drawbacks.They should be kept at temperatures below 77 degrees Fahrenheit; for every year in which they are stored at higher temperatures they will lose 20% of their capacity. Samsung NP-R40 battery Even when stored at lower temperatures,they will lose about 5%,but that is much less than other batteries.
If they get excessively hot,they will be ruined.Manufacturers recommend 59 degrees Fahrenheit as the ideal storage temperature,but you can safely store lithium ion batteries in the refrigerator and allow them to warm before using them.Samsung NP-R65 battery Another weakness of lithium ion batteries is that they begin to deteriorate as soon as they leave the factory,even when they are in storage.They will last longer if they are used,and should not be stored at more than a 40% charge.
Storing them with too low of a charge,however,will either cause them to die or make them very hazardous when they are being recharged.Samsung NP-R70 battery The best way to handle your lithium ion batteries is to use them.Lithium ion batteries,evening the best of circumstances,have a normal life span of between two and three years.They are,however,a work in progress,and lithium ion battery chargers makers are continually researching improvements to the technology.Samsung NP-X60 battery A new generation of lithium batteries appears at approximately six month intervals,and as time goes on,their life span may very well be considerably extended.
Lithium-ion is the Power Behind Today's Laptop Batteries
If you own a laptop computer,chances are very very good that it is probably powered by a lithium battery.Samsung P210 battery This battery type has found application in a wide variety of consumer electronics,including PDAs and cell phones.They have gained widespread popularity due to economic and technical reasons,particularly their high charge to weight ratio. Samsung P460 battery Lithium-ion computer batteries also require that protection circuitry be incorporated into the battery pack to monitor the battery charge and to provide safe voltage and current levels,as well as ensuring that the temperature of the battery remains in a safe operating range.
Samsung P50 battery However,the disadvantages associated with lithium-ion batteries include:the possibility that a failed battery pack can ignite under adverse conditions,they are more sensitive to high temperature environments than the other battery technologies in their ability to retain their charge,they may fail if they are completely discharged,and the inherit chemistry of the battery leads to degradation with age as opposed to the stronger correlation between battery failures and charge/discharge cycles of the older battery chemistries.Samsung P560 battery Additionally,lithium-ion batteries have a single cell voltage of 3.6 volts as compared to 1.2 volts per cell of nickel-cadmium batteries.
Lithium-ion batteries have replaced the nickel-cadmium (NiCd) batteries that were first used to power laptop computers and the nickel-metal hydride (nimh batteries) batteries that superseded the NiCd laptop battery technology.Samsung P60 battery They have dominated today's rechargeable battery market for laptop computers because they are much lighter than the other types of laptop batteries,they retain their charge longer than the other technologies and because they do not suffer from the memory effect phenomenon.A typical lithium-ion battery has two times the energy density of a standard nickel cadmium battery. Samsung P60 Q210 battery
Cylindrical lithium?primary battery cells are generally tubular in shape,much like the shape of standard alkaline batteries.Several cells are enclosed in a plastic housing and the individual cells are connected in a manner to provide the proper output voltage and to maximize storage capacity (rated in milliamp-hours). Samsung Q310 battery Prismatic shaped lithium-ion cells are also available,but they are much smaller and are typically used in devices such as cell phones where weight and space is a prime consideration.A typical battery will last only 2 to 3 years. Samsung R40 battery This is true even if the battery remains unused so it is important not to purchase a replacement laptop battery until it is ready to be put into service.
There are several things that affect the life of a lithium-ion computer battery.Battery degradation is hastened by heat,so storing the battery in a cool environment will prolong its life.Manufacturers typically recommend a storage temperature of approximately 60°F for the long-term storage of lithium-ion batteries.Samsung R410 battery These batteries, as stated previously,do not retain a memory from partial discharge cycles,so full discharge cycles are not required.In fact,partial cycling of the battery will help extend its life. Samsung R45 battery Lithium-ion batteries do have a limited lifetime like the older battery technologies,but this is relatively independent of their charging cycles and is chiefly related to their age.
Do You Know The Pro's and Cons of Lithium Ion Batteries?
Lithium ion batteries were invented as long ago as 1912 by Gilbert N.Lewis,but it was a long time before they were developed enough to be launched on a mass market level.Samsung R460 battery This happened in the early 1990's with Sony pioneering their commercial use.They can be constructed in a wide variety of shapes and sizes,resulting in them being tailored to the available space in the device in which they are to be used.The lithium batteries are also much lighter than other equivalents,due to the nature of the material and the high open circuit voltage compared to other batteries.Samsung R505 battery This low weight makes it ideal in hand held and mobile devices for obvious reasons,and popular in these days of high tech gadgets.
Another major advantage is that they do not suffer from memory effect.This is the condition,whereby other rechargeable batteries,if not fully discharged before recharging,lose their maximum energy capacity over time and thus hold less charge.Samsung R510 battery They also do not have such a drastic self discharge rate as other batteries-just 5% per month,compared with up to 30% per month in other battery types.However,Lithium ion batteries are not perfect,and there are drawbacks.One of these is that their life span depends upon their age-and not the time from which they were charged,or the number of times they have been charged. Samsung R60 battery
They begin to lose capacity gradually from the date of manufacture irrespective of the amount of charging cycles they have.Therefore the manufacturing date is useful to know,especially if there is a big time lapse from manufacture to being used eg due to storage. Samsung R610 battery Some Lithium ion batteries (such as laptop batteries) can lose around 20% of their capacity per year,when stored at normal temperatures.However,when exposed to prolonged higher temperatures,this figure can increase to as much as 35% per year.Another key factor is the charge level-when stored partially charged,these figures can be dramatically reduced. Samsung R65 battery This makes lithium battery unsuitable for certain applications-such as back up batteries.
The battery must never be discharged below a certain threshold,otherwise the battery will be damaged irreversibly.Therefore,the devices that use them have a built in system to shut them down when the charge level meets that minimum threshold.Samsung R70 battery For this reason,Lithium Ion batteries are designed and manufactured specifically for the device they are to power and are not available as generic batteries.Having said that,there are some versions available that have a built in circuit to monitor the minimum charge level and shut the battery down when it reaches that level.These are known as "smart" batteries. Samsung R710 battery
How to prolong the life of your Lithium Ion battery
Charge the battery early and often,unlike other rechargeable batteries.
If you do not intend to use the battery for a long time,charge it to a level of approximately 40% of capacity.
The battery should be kept cool.They will age faster at higher temperatures,so keep as cool as possible when not in use. Samsung X360 battery They can be safely stored in a refrigerator for optimum prevention of aging.(note: they should not be frozen)
If the device you are using is often run from a mains power supply (e...g laptop) and it is possible,remove the battery when using mains power.This prevent the battery from being subjected to high prolonged temperatures which can shorten it's life.
Any steps to reduce the heat that the battery is subjected to will benefit it's lifespan. Samsung X460 X60 battery
When purchasing replacements,try to purchase a primary battery that has the shortest possible time from manufacture to retail.(though it may be difficult to find out this information).
In short Lithium ion batteries are a very versatile battery,ideal in lightweight applications and not subject to memory effect.However,they do degrade at higher temperatures which means they are not a universal battery solution. Samsung X65 battery
Get The Most Information About Your Laptop Lithium Battery
I get a lot of questions about laptop batteries around the first of the new year.One of the biggest reasons is that many people get a laptop for a gift (or give themselves the laptop).I do computer repair and deal with laptops issues often. Samsung NP-R20 battery Having been a laptop owner myself for more years than I care to remember,I also face the laptop battery problems any user might.Laptop batteries have come a long way since the first ones in the 90s.The latest type,lithium batteries,are a huge improvement in both power and endurance.
But any laptop battery is subject to two very basic factors in determining the life cycle.Samsung NP-R20F battery The number of "charge cycles" (how many times the battery can be charged to 100% and depleted) and exposure to heat.The cycles eat into the ability of the battery to hold a charge and the heat causes the chemicals to lose their ability to recharge.The shelf life of any laptop battery is limited too. Samsung NP-R25 battery So if you are shopping for a replacement battery always check the date of manufacturer.If older than two years I would pass.Batteries do deteriorate over time just setting on the shelf regardless of use.It's a chemical thing and the ability to hold a full charge. Samsung R20 battery
There is also a lot of misinformation about laptop lithium battery in general based on the older models and technology.You do not need to totally drain the new lithium models.Its fine to use it until you get a warning of low power but don't purposely try to push it to empty since there is no reason to do so now.Samsung R25 battery And if you do push it to absolute no power you might also experience some lose of data,a very good reason not to go that route.Another common question is do I take out my battery while running on DC power?The answer is yes,this is due to the heat problem mentioned above. Fujitsu LifeBook B2620 battery
The amount of heat and duration can impact your battery's life so it's a good idea to remove it when plugged in to help limit the amount of heat exposed to when possible.A majority of laptop users only use their laptops away from power in frequently so this could really be a big factor in making your battery last a long time.So what is a normal life expectancy of the newer batteries?Fujitsu LifeBook B2630 battery You should check your manufacturer's specifications but the average is 300-500 cycles.So that number can mean different time periods for different users since it's very dependent of how often you use just battery power for operation.
Some manufacturers recommend that if you are going to store it for a long time to do it at half charge. Fujitsu LifeBook P7000 battery The thing to realize about any battery is it does have a measurable lifespan and efforts to extend it will help but not stop the eventual demise.So the number one thing that you can do to extend the life of any of the newer lithium batteries is always take it out if you are running on DC power to lessen the heat impact. Fujitsu LifeBook P7000D battery Whenever buying any replacement batteries,always check the manufacture date and try to find the newest one available.
From what I've seen from personal and customers use is to figure about 24-28 months is the average.Longer when you use it less away from DC power and if you remember to always remove when using DC power.Fujitsu LifeBook P7010 battery When you do remove your battery you should store it in a cool and dry area.Some people go as far as to stick it in the refrigerator but that may not always be possible or convenient.I generally just put it in my laptop carrier so I don't forget it when I get ready to travel.I usually store it fully charged so it will have its maximum life when I use it. Fujitsu LifeBook P7010D battery
Do You Know How to Preserve Laptop Battery?
by largebattery2012 @ 2012-06-21 – 06:03:48
Our laptops or phones are reducing their autonomy over their lives.How many terminals do not start if they are not plugged into power?This is especially important as more and more manufacturers have practical limits dishonest in our opinion,prevent the user changes his own battery,and thus require in case of a very expensive problem to return service. Fujitsu LifeBook A3040 battery This is the main problem.Born of the fact that a previous generation of battery (nickel and lead),it was actually not bad.But today,with our lithium battery,it is imperative to avoid it.
To drop your laptop battery below 10% is a definite risk,making it fall to zero may cause a decrease of 20% capacity. Fujitsu LifeBook C2000 battery And even worse,prevent the battery charging.In fact,empty it completely can cause chemical damage,then an internal security prevents reloading to prevent more accidents.Security exists on most operating systems to turn off the laptop if the battery level is dangerously close to 5-10% windows,it is found in Control Panel/Power Options.Fujitsu LifeBook C2310 battery However,when your battery reaches below 20%,it is important,once a month is a rhythm advised,to let it recharge quietly and without interruption as possible.This is called a full charge cycle.
Think also,when you store a battery for some time without using it,charge it to 40%. Fujitsu LifeBook C2320 battery Certainly,the lithium batteries will discharge very little if they are inactive,but 40% is a reasonable safety.Store the full conversely may be harmful (pressure of internal stress which increases the wear).It is inexorable and inevitable,one can only slow the process.Fujitsu LifeBook C2330 battery Little tip: when you buy a mobile device,take a look on the date of manufacture of the battery,and comparable model,choose the one with the most recent battery!an ion accumulator,depending on its quality,has a life expectancy of between 500 and 1000 charge cycles.We put the question to Nathalie Halloche responsible for MSI Notebook,which kindly replied us: Fujitsu LifeBook C2340 battery
"You should know that the lithium-ion battery has no memory."One might think that the battery could suffer from a low voltage because it constantly supported if the computer is connected to the sector.However,is not the case with batteries in lithium-ion battery that MSI uses its notebook.Asus M50S battery During the recharge,the power gives some energy to the battery and another for the operation of the computer.Finally,once the batteries fully recharged,the circuit switches off the current that is passed to stop receiving electricity and prevent overcharging.There is no fear to small refills,on the contrary.Asus L50Vn battery On average,a Li-ion battery lives between 500 and 1,000 charge cycles.When the computer is connected to the sector,recharge is not continuously.It expected that the battery loses 10% of its load to the recharge of 10%.Therefore 10 refills are needed to achieve a full cycle." Asus G60VX battery
So that is not the problem.If many sedentary laptop users see the status of their primary battery to degrade within a few months,it is mainly that they practice not complete recharge cycle,see above.Note also that MacBook users cannot also remove their battery sedentary userevent hulls "unibody"of recent models in them.Asus G60 battery And for the former for model,the portable idling automatically if you remove the battery.Do not sensationalize,but are still small explosive devices.And who do not high temperatures.In 2006 (Nokia phones) and 2008 (PC laptops Sony and Apple),two sets of batteries that were overheating risks have been recalled.Asus G51Vx battery And some devices have caught fire,were squarely ordnance.When you load your laptop,check at least once that your battery is not abnormally hot,and if applicable,look on the Internet if its series No.Did not the subject of a recall by the manufacturer.
Do You Know How to Check Laptop Battery Life? Asus G51V battery
The battery life of a laptop is an obviously important part of the laptop's overall performance.If you run out of battery life you can't do anything-so try not to run out,right?While that rule seems simple enough,it isn't always easy to follow.Laptop manufacturers have a tendency to overstate laptop battery life,and sometimes by no small margin. Asus G51J battery A manufacturer who claims ten hours of battery life rarely confesses that the stated battery life can only be achieved if you leave the laptop running at idle with the display a minimum brightness and WiFi off.
One of the worst things that can happen while working on a laptop is to have your battery die while you are in the middle of an important project.Asus G50V battery To avoid this,it's good to know how much life your computer battery has left in it.Most laptop computers offer a couple of ways to do this,and there are several free downloads that will put a large battery-life monitor on your screen,meaning you'll never be caught with a dead battery unexpectedly again. Asus N62 battery
Look in your computer's system tray,which is at the right side of your taskbar near the clock.You should see a battery icon.If it doesn't show up automatically,click the arrow on the left side of the system tray,which will expand the tray and show all icons.Place your mouse over the battery icon,but don't click on it.Asus L50 battery The icon will show roughly how much life is in the battery.Hovering your mouse over it will pop up a label showing exactly how much time remains before you run out of power and what percentage of the battery remains charged. Asus G50VT battery
Plug in your AC adapter if the battery needs to be charged.The status in the system tray will show that the computer is now running on AC power, and the battery is charging.Many sources recommend letting a battery fully drain,so as not to shorten its "memory."Asus X57VN battery However with lithium battery,the most common type of battery in modern laptops,this is not the case.If a computer battery is discharged past the critical 3% level,the battery may not be able to be recharged again.This effectively kills the battery. Asus X55Sv battery A laptop battery needs a small amount of power in it in order for it send communication back and forth with the laptop to recharge the battery.
If you're interested in how your laptop battery might hold up during less intense use,however,you can use the included Reader's Test benchmark.This can be accessed by clicking on the Options button and then changing the Benchmark Mode to Reader's Test.Asus X55Sr battery Once that's done, click on the Load Text button at the bottom of the window and select a text file.The Reader's Test,once activated,will open the text file and automatically scroll through the file time and time again until your laptop's battery gives out.
A battery in a "weakened state" is a good candidate for this fatal mistake. Asus X55Sa battery When batteries are brand new or inactive for more than 2 months,they are in a weakened state and must be conditioned with 4-5 partial discharge and recharge cycles to bring them up to full capacity again.A new battery may cause the backup power battery icon on your computer to indicate you have a low battery condition.We recommend that you let the battery charge overnight in your notebook computer. Asus M51Vr battery It may be necessary to remove and replace the battery and restart your computer with the battery installed in order for the computer's start up sequence to properly recognize your new battery.Rechargeable batteries will self discharge when not in use over a period of time.This might seem obvious but don't burn,disassemble,mutilate or short circuit batteries. Asus M51Va battery
Matsushita Developed New and Safer Laptop Battery
Matsushita Battery Industrial Co. Ltd (MBI),most widely known as Panasonic,announced today that the company has developed a safer lithium battery for notebooks.The company says that they began shipping the battery this April and is now ready for mass-production. Asus M51Sr battery According to MBI, the HRL-consisting of an insulating metal oxide on the surface of the electrodes-can cease short circuits.When a separator is pierced by an electrically conductive material such as a metal particle,a short circuit develops,causing the battery to overheat and at the worst,catch fire,MBI explained. Asus M51Sn battery
How is it safer?A heat-resistant insulator is added to the battery cell.It is meant to prevent overheating during a short circuit and therefore should prevent fires and explosions.Asus M51Se battery The company has also proclaimed that "contaminating foreign substances" have been eliminated from battery materials which results in a clean environment for the battery factory.It is believed that Sony's exploding batteries were contaminated with small metal particles during the manufacturing process. Asus M51Kr battery New laptop battery standards targeting safety and reliability are on their way ( before 2008 ) from both the IEEE and the IPC.
The company has also pointed out that they are making a special effort to ensure that there will be no contamination in these batteries: "MBI has taken measures to prevent lithium 18650 battery from contaminating with electrically conductive materials by eliminating foreign substances from battery materials and creating a clean environment in the battery factory" the company said in a prepared statement. Asus M51E battery Sony's battery cells,those guilty of all the battery fuss this year,were said to have been contaminated with small metal particles during the manufacturing process which ultimately caused the short-circuiting to occur and many major computer manufacturers to issue battery recalls. Asus M50Sv battery
The battery is protected from overheating by the addition of a heat-resistant insulator to the battery cell.Normally,a li-ion battery would only have a thin separator between the cathode and the anode that could easily be punctured by a short-circuit. Asus M50Sr battery And as we are now painfully aware,short-circuiting batteries can sometimes lead to bad things such as fires and explosions.The additional heat insulator,according to Matsushita,has better insulating and protective features than the current separator and will prevent overheating even in the event of a short-circuit. Asus M50Sa battery
Both the IEEE and the IPC have announced that they are working on issuing new laptop battery standards in hopes of improving safety and reliability.The IPC expects to have their standards completed by the second quarter of 2007,and IEEE recently announced that they have accelerated their schedule so that the revised IEEE 1625 standard will be complete by the end of 2007. Asus M50Q battery
Tips To Make Laptop Battery Lasts Longer By Lithium Battery
Laptop computers used to run on nickel-cadmium batteries,which experienced the "memory effect,"where they lost capacity over time if recharged before they were drained.That's no longer the case.Newer laptops use lithium-ion or li-polymer batteries. Asus M50V battery Repeatedly discharging the battery to zero doesn't help a lithium-ion;in fact,it will probably shorten its overall life and capacity.The only situation in which you may need to intentionally deep discharge your battery is if its built-in digital fuel gauge,which tracks the remaining battery power and reports it to your computer,gets out of whack as a result of long-term storage or heavy use. Asus M50 battery
The basic makeup of each battery type is very similar.Each has a positive electrode (cathode),a negative electrode (anode),a separator and an electrolyte.However,the chemistry in each is different.The differences offer various levels of performance.Much of our newest technologies demand much more power than its predecessors. Asus V50V battery The features and sophistication of the newer electronics have truly increased the power demanded from batteries.It is this power demand that motivated the industry to develop power sources to keep up.
A lithium is different from an alkaline.Both the chemistry and construction of lithium and alkaline differ. Asus G50 battery It is the lithium battery design that helps this newer power source meet the high drains of many of today's devices.These new and powerful batteries are used in various portable electronic devices,and are widely used as a mobile laptop computer power source.Here are some tips to make your laptop power source last longer: Asus X57 battery
Calibrating Helps
Most manufacturers agree that there is some benefit to completely discharging your lithium batteries periodically,especially for your laptop.If you completely drain the laptop cell,it will help to recalibrate which will allow for more accurate measure of the life span. ASUS N43 battery You should try this every 30 charges or when you notice readings are off.Calibration does not extend the discharge time-it only resets it to show the remaining charge accurately.
When I got my first cell phone,I was told to let it completely die before recharging.This idea is that of memory.This process of completely discharging before recharging to the max,would supposedly give my phone the complete battery capacity. ASUS N43J battery If I recharged with 50% capacity already, the battery would assign the half way point as the empty point,and cut the capacity in half.
But this does not apply to lithium cells-only for nickel based.In truth,fully discharging your lithium battery often can be harmful to its battery's health,possibly making it completely unusable if levels go too low.The modern lithium has a safety circuit to make sure it doesn't reach the point of no return. ASUS N43JF battery The safety circuit isn't guaranteed.If you leave it completely drained for a few days,the safety circuit probably won't save it.
Heat Kills!
Heat truly decreases the life span of lithium batteries.You may notice that if you use your laptop as a replacement for a desktop,the battery capacity decreases greatly.Some measure the decrease at 60% to 80% of the original capacity after about a year. ASUS N43JF-A1 battery If you use your laptop as a desktop,you should remove the battery while using the plug-in power source.And before storing your laptop computer battery,you may want to first check with the manufacture on the effects of moisture and dust in the casing.
Correct Storage
If you don't plan on using your lithium batteries for a while,you may want to put them in your refrigerator-not the freezer!Ideally,you should store at a 40% charge level. ASUS N43JF-VX019V battery At 100%,you may have unnecessary stress and internal corrosion.But if the charge is too low,the battery can eventually become unusable because it will self discharge.
Do You Know How To Repair A Laptop Battery?
Most laptop batteries are smart. ASUS N43JF-VX033V battery This means that the pack consists of two parts:the chemical cells and the digital circuit.If the cells are weak,cell replacement makes economic sense.While nickel-based cells are readily available,lithium battery cells are commonly not sold over the counter,and most manufacturers only offer them to authorized pack assemblers. ASUS N43JF-VX034V battery This precaution is understandable given liability issues.Always use the same chemistry;the mAh rating can vary if all cells are replaced.A laptop battery may have only one weak cell,and the success rate of replacing the affected cell depends on the matching with the others.
All cells in a pack must have a similar capacity because an imbalance shortens the life of the pack. ASUS N43JF-VX039V battery Furthermore,the state-of-charge of all cells being charged for the first time should have a similar charge level,and the open-circuit voltages should be within 10 percent of each other.Welding the cells is the only reliable way to get dependable connection. ASUS N43JF-VX051V battery Limit the heat transfer to the cells during welding to prevent excess heat buildup.Some batteries are equipped with a solid-state switch that is normally in the "off" position and no voltage is present on the battery terminals;connecting the switch terminal to ground often turns the battery on.
If this does not work,the pack may need a proprietary code for activation,and battery manufacturers keep these codes a well-guarded secret.ASUS N43JF-VX062V battery The typical SMBus battery has five or more battery connections consisting of positive and negative battery terminals,thermistor,clock and data.The connections are often unmarked;however,the positive and negative are commonly located at the outer edges of the connector and the inner contacts accommodate the clock and data.For safety reasons,a separate thermistor wire is brought to the outside. ASUS N43JF-VX064V battery Figure 1 illustrates a battery with six connections.
The circuits of some smart batteries must be kept alive during cell replacement.Disconnecting the voltage for only a fraction of a second can erase vital data in the memory.The lost data could contain the resistor value of the digitized shunt that is responsible for the coulomb counter. ASUS N43JF-VX071 battery Some integrated circuits (IC) responsible for fuel gauge function have wires going to each cell,and the sequence of assembly must to be done in the correct order.Cell replacement of a smart battery has a parallel with open-heart surgery,where doctors must keep all organs of the patient alive. ASUS N43JM battery
How can you find the correct terminals?Use a voltmeter to locate the positive and negative battery terminals and establish the polarity.If no voltage is available,a solid-state switch in the "off" position may need activating.Connecting the voltmeter to the outer terminals,take a 100-Ohm resistor,tie one end to ground,and with the other end touch each terminal while observing the voltmeter. ASUS N43JM-051A460M battery If no voltage appears,the battery may be dead or the pack will require a security code.The 100-Ohm resistor is low enough to engage a digital circuit and high enough to protect the battery against a possible electrical short.
Establishing the connection to the battery terminals should now enable charging.If the charge current stops after 30 seconds,an activation code may be required,and this is often difficult if not impossible to obtain. ASUS N43JM-8GB battery Some battery manufacturers add an end-of-battery-life switch that turns the battery off when reaching a certain age or cycle count.Manufacturers argue that customer satisfaction and safety can only be guaranteed by regularly replacing the battery.Such a policy tends to satisfy the manufacturer more than the user,and newer batteries do not include this feature. ASUS N43JM-VX002V battery
If at all possible,connect the thermistor during charging and discharging to protect the battery against possible overheating.Use an ohmmeter to locate the internal thermistor.Warming the battery with your hand may be sufficient to detect a small change in resistor value when looking for the correct terminal on the battery. ASUS N43JM-VX005V battery In some cases the chemical battery can be restored,but the fuel gauge might not work,is inaccurate,or will provide wrong information.After repackaging,the battery may need some sort of initialization/calibration process.
Simple Guidelines when Repairing Battery Packs
Only connect cells that are matched and have the identical state-of-charge. ASUS N43JQ battery Do not connect cells of different chemistry,age or capacity.
Never charge or discharge Li-ion batteries without a working protection circuit unattended.Each cell must be monitored individually.
Include a temperature sensor that disrupts the current on high heat.
Apply a slow charge only if the cells have different state-of-charge.
Pay special attention when using an unknown brand of cells.Some may not contain a high level of intrinsic safety features.
Li-ion is sensitive to reverse polarization.Observe correct polarity.
Do not charge a Li-ion battery that exhibits physical damage or has dwelled at a voltage of less than 1.5V/cell. ASUS N43JQ-071A740QM battery
When repairing Li-ion,assure that each cell is connected to a protection circuit.
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