As far as we know the laptop self speaker are low quality and Easily damaged part. We always use it to call in the internet with our friends and family. The bad speaker can not transport the clear avoice to the chatting person by the internet. So we usually will replace a good speaker and laptop battery the time we buy a new laptop.

My work need to use Skype to connect the foreign Customers usually. So we should replace a new high quality speaker for my Lenovo ThinkPad T60 battery. I buy a new sony laptop speaker from www.laptops-battery.co.uk and replace it by myself. The whole couse will be done in two steps : 1. Removing the speaker from laptop. 2. Replace the new speaker on the motherboard.

Removing the Speaker Assembly

• Follow the instructions below before you begin.
• Remove the center control cover which besides the Dell Latitude D610 Battery.

.

• Remove the keyboard.
• Remove the display assembly.
• Disconnect the speaker cable from the Dell U4873 Dell D5318 system board.
• Remove the four screws that mount the speakers at the base of the computer.
• Remove the speaker assembly.
• 

Replacing the Speaker Assembly

• Align the gracious leadership in the speaker assembly with the guide posts on the bottom of the computer, the smaller is the lock assembly.
• Insert the four mounting screws back the Dell Inspiron 640m Battery cover .
• Route the speaker wire carefully through the routing channel.
• Connect the speaker cables to the system board.
• The display assembly (see Replacing the Display Assembly Substitute).
• Replace the keyboard (see Replacing) the Dell Inspiron 710m Battery keyboard.
• Replace the center control cover (see Replacing the Center Control Cover).

Then you can use your new speaker to talk with your friends on the internet now.

A modern laptop battery is a delicate device that requires protection against damage. The most common protection is a fuse that opens if there is a too onerous. Some backups will lead to a permanent opening for the battery disable, for example if the fuse wire is blown. Other safety devices are resettable. The polyswitch ™ is such a resettable fuse. Incorporated into the current path of the battery, this device is a high impedance at too high a burden. The polyswitch ™ returns to its normal function as soon as the situation returns to normal.

Batteries in an explosive environment must be explosion proof. Hazardous environment includes oil refineries, mines, grain elevators and fuel stations at airports. Such zones are predestined for the use of wireless communications and mobile computing. Non-explosive Toshiba PA3399U-1BRS to prevent too great heat and may cause electric sparks with defective equipment. Due to the strict licensing requirements, the cost of battery explosion two are three times higher than for standard batteries.

Another battery that provides the highest protection devices is the lithium-ion battery. This is done to provide security in all circumstances, because it is in the hands of a wide audience. Typically, a field-effect transistor (FET) will be opened if the charging voltage is reached from any cell 4.30V. A separate fuse opens when the cell temperature reaches 90 ° C. In addition, a switch will interrupt permanently in each Toshiba PA3451U-1BRS cell of the charge current when the pressure safety threshold has been exceeded the value of about 10bar (150 psi). To protect the battery against overload, the load path is interrupted by the fuse circuit at approximately 2.50 V / cell. Longer storage at voltages of 1.5 volts per cell and deep damage to the lithium-ion battery can, and create security problems when trying to recharge the battery.

Each parallel string of cells in a lithium-ion battery requires an independent voltage monitor. The more cells are connected in series, the more complex the security posture. Four Toshiba PA3465U-1BRS cells in series, the practical limit for commercial applications.

The internal protection circuitry shall be designed so that the lowest resistance is built into the load path. The circuit in a Zellulartelefonbatterie consists of two FET switches in series. A FET is responsible for the upper, the other FET for the lower voltage switching threshold. The joint resistance of the two FETs is idle 50-100 milliohms (mW). This virtually doubles the internal resistance of the Toshiba PA3107U-1BRS battery.

A critical problem arises if static electricity or a faulty charger destroyed the protective circuit of the battery. This can lead to permanent ON state of the circuit breaker, without which the operator knows anything about it. A battery with a faulty protection circuit may function normally, but offers no further protection. If a charge is about the safety threshold, eg by a defective charger, a leakage of gas made with inflammation. Such a situation must be avoided at all costs. Such a Toshiba PA3331U-1BRS battery to close shortly, can lead to an explosion.
Small lithium-ion batteries containing magnesium chemicals that contain one or two cells may include a fuse as protection. Magnesium is more tolerant than cobalt, and these cells are regarded as safe when they are small.

Although less expensive, the absence of a protection circuit brings a new problem. Zellulartelefonanwender we’ll have access to Toshiba PA3450U-1BRS chargers that rely on the protection circuit to stop the load. Without a protective circuit, the cell voltage will rise too much and thus damaging the battery. Too much heat, even the swelling may be the result. The use of the battery and the charger should be halted when a lithium-ion battery is hot.

To ensure safety, manufacturers sell lithium Toshiba PA3534U-1BRS batteries, not separately, but always assembled into a battery, fully integrated with the safety circuit. The circuit is often the object of a special examination before the producer cells, and circuitry for assembly at liberty. Although there were several incidents involving leaks and infections, should the lithium-ion batteries are known to be safe.

4 – Lifting and replace the battery

For the purpose of raising the Dell Latitude D420 Battery must be open and the separation of cables and start racing as we must disconnect the negative cable first and then the positive cable and you should not use force or violence when the disassembly in order not to get damage to link emerging from within the battery Terminal As shown in the picture below.

For the purpose of raising the Dell Latitude D820 Battery must care and caution, especially that were not equipped Bmmsk and the holder of the special battery heavy and may fall, causing spills acid solution and the destruction of the dye and a metal car, or may cause damage to the engine that landed by mistake.

5 – Installing the new battery

Must also be done carefully and install the XPS M1710 battery cables and make sure that the end of the cable clamps related to negative or positive non-worn or Mthrcp diameter and is suitable for Qatar as a connector on the battery is important to note that the diagonal of the node positive and negative points is equal and this means that the lattices related Eabelin positive and negative as well as with different Qtarhama terms.

When installing the clip preferably Chhimh very light layer of petroleum jelly material to prevent corrosion.

And then re-install the battery holder and installed into place to ensure that the specified movement.

6 – Use of sealed batteries, Sealed No Maintenance Batteries modern that do not require maintenance

Containing the battery was appointed to monitor the status of the ThinkPad X41 Tablet Battery . When careful consideration by the index was green, it means that the battery is good, loaded, and the scene was a dark (black) means that the battery needed for shipping and that was the color yellow or colorless, the battery is worn out and must be replaced, and here must be examined carefully and with a lamp detector to make sure.

This type of battery does not need to maintain and add distilled water to examine the density and quality of the solution, but know the condition of the battery and the validity of the eye examination, as explained nose.

Is very appropriate for our country because of the high ambient temperature, which usually cause an increase in evaporation of water from a solution of Lenovo ThinkPad X60 Batteryin summer and cause dryness and damage to the battery, especially when the loss of follow-up and ongoing monitoring of how many batteries does a lot of drivers of vehicles.

The article Via laptop battery blog Blogsome
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Simple steps and through the illustrations you can take care of your car laptop battery. Maintain it in good condition as long as possible and avoid to replace a new battery.

1 – cleaning cables (connectors)

Cleans the surface of the Inspiron 1521 Battery up and take note of any corrosion on the heads and clips (a tablespoon of soda (bicarbonate), then dissolved a cup of warm water and non-metallic brush to rubbe the cleared sediment and then pours cold water to remove these sediment and the bicarbonates.

But before you disconnect the cable, be sure that do not lose the programming may be used in some devices of car attachement such as radio programming, radio stations. You can use this simple link (shown below the image) to ensure the electrical power supply suitable for the memory of those devices during the battery separation period. 9 volts Dell Inspiron 710m Battery is enough to temporary keep the memory of radio electric and would be sufficient for a period of a hour.

Now it is possible that … The picture Via http://www.laptops-battery.co.uk

Separating the cables and start the negative cable to prevent accidental short-circuit (Short Circuit to car body), using the header key measure Drill 5 / 16 in Box Wrench or any other nut install a link cable, and then clean the grate and brushing link Bgha Almgamsp solution of bicarbonates can also soak the cup containing the link to the bicarbonates to get rid of acid deposition on lattice and calcifying link.

2 – open manhole covers of battery

And check the level of the acid solution within the view of the battery through the holes, where the level must be the solution about 1 / 2 Ang lead-up sheet inside the Dell Inspiron 1720 Battery , in the case of the low level of this strengthens the addition of distilled water to raise the level of liquid to 1 / 2 Ang required, and attention should be not to add a lot of distilled water causing rash solution outside of the battery.

Should be left for the distilled water to mix with the solution in the meantime, check and inspect the body of the battery from the cracks or broken as in this case requires replacement of the battery with new ones.

After it is better to re-connect cables to the Latitude X300 Battery so as not to lose the programming of peripheral devices.

3 – Checking the battery charge

Density of the solution should be checked using a test known as Almkthav Hydrometer the Latitude D830 Battery is fully charged when the readings in all the holes is 1.265 or higher, and if the reads 1.200 or less, it means that the battery had lost its shipped and must be re-shipped (and this test and reading mean specific gravity the solution).

The article Via laptop battery blog

A laptop battery in a laptop is aging faster than in other types of use, because of the heat. The use of a laptop’s internal temperature rises to 45 ° C. The combination of high temperature and promotes the full state of charge Zellenoxydation, a circumstance which, if once present can not be undone.

The life expectancy of the Sony VGP-BPS8 battery when it is working with high ambient temperatures, is only half as large, such as in moderate 20 ° C or. If a laptop left in a parked car, made worse in the blazing sun, the situation also. All batteries suffer permanent capacity loss, due to high temperatures but lithium-ion is more affected than other battery chemistries.

Some Japanese computer manufacturers have introduced a number of notebooks, for which the Dell Latitude D600 battery is arranged outside, and is a part of the housing. This design increases the battery life because the battery operates at room temperature. Some models allow for different battery sizes in order to adapt them to various requirements.

Lithium-ion is well suited for laptop users who continually switch between fixed-power and XPS M1330 battery. This user profile meets primarily for sales, maintenance and medical personnel. Here are the reasons why.

With nickel-based batteries, the charger performs a full charge every time, when the portable device is connected to a fixed power. The Latitude D630 battery is charged until a signal arrives, indicating that the battery is full. This signal is either a voltage change or an increase in temperature. Due to the delayed reaction, a permanent capacity loss occurs caused by overcharge and high temperature. Lithium-ion only receives charge if the voltage is low.

More articel here Battery blog

As we all know, the Latitude D820 is higher than the thin and light 14 “widescreen D620 and the budget oriented 14″ standard aspect Latitude D520 battery in the lineup. The D820 is an updated version of the latitude D810 battery and features the Intel Core Duo processor to replace the D810 Pentium M and a significant weight reduction in the D810.

As its big wid screen, so the latitude d820 battery is also can not afford its 3 hours daily work. The first year I bought D820, I used the battery frequently as work and travel, fortunately it died after 10 moths in the dell 1 year warranty. I do not know why the machine is 3 year warranty but the battery is only 1 year warranty. Now I know, after the 3 year used 3 batteries replacement (the second year I buy a Macbook for travel). Now I find some reivew about Dell latitude d820 battery.

I bought 2 types Dell latitude D820 battery : 6Cell and 9Cell. I do not want to say anything about my bad 6 Cell battery (the one died after 10 month). Below is the 9Cell 85Wh batetry photos.

The Latitude D820 battery Tech specs :
Device Type : Notebook battery
Technology : 9-cell lithium ion
Capacity : 85 Wh
Recharge Cycles : 300-500
Work with : Dell latitude D820, Latitude D830 battery

Customer review in Dell web site:

I have run through three laptop batteries in four years on the D820. Only use is CPU and HD, never DVD. Typically charge starts to drop off in 9-12 month time frame to the point that unit will not run on battery for even 1 minute. This is totally unacceptable; by comparison original Mac batty still going strong after several years. Bye, bye Dell – you have ignored this user-expensive issue for years.

I’ve been a loyal Dell user for years. However, the next laptop I or anyone in my family or circle of friends buys is most likely going to be something other than a Dell. Why? Because if Dell consciously ignores this abundantly-documented laptop battery life problem, who knows what self-serving obsolescence might be built in to newer Dell laptops? This battery fiasco is one of the easiest ways for Dell to lose loyal customers who consistently seek out high-end products because of their requirements for quality and reasonable product life cycle

I purchased 2 extended batteries with my new Latitude D820. Both batteries failed within 1 year. This is not acceptable for items of this cost. If they are this unreliable they should be covered under the extended warranty

Lasted about 14 months the died completely like my Latitude D620 battery. Just made it out of warranty. I guess there was clause in my extended 3yr warranty that the battery is not covered.

The Dell latitude D820 battery replacement Review in Amazon:

This battery, while appearing to be the same size as the Dell original, is just a few millimeters off. As a result, my battery rarely charges.The battery can be docked, but the metal connectors in the battery are not (sufficiently) touching the pins in the system to charge the battery.

To resolve, I have to do everything from jiggling the battery to completely removing & resetting it. Even then the problem is not guaranteed to go away. Finally, the Dell Latitude D830 battery has never charged fully. When the charge is working , it always seems to quit around the 90% area. Since I’ve had my new battery, I’ve been running on A/C most of the time, but I am dreading my next trip when I longer have an outlet to plug into.

I received the Batery for my Dell D820, and it fit perfectly! On the Positive side, it was a perfect fit, and when the hard drive is not whirring, the charge indicator says I have over 5 hours of batery life left, which is great. The color of the battery differs from that of the computer only slightly.

On the negative side, the build quality doesn’t look as sturdy as the original, and the charge indicator lights look a bit “flimsy”, but then again, the original Dell latitude D520 battery lasted me only a year.

Even if this one lasts for the same ammount of time, it still cost me LESS THAN HALF of what an original Dell battery would have cost… As far as I’m concerned, I would recommend this product to anyone who owns a Dell and donesn’t want to get ripped off buying $300 battery that will only last a year, maybe even less.

The article Via Laptop Battery blog

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Nickel-metal hydrides are less tolerant than nickel-cadmium in terms of the charge at low or high temperatures.
Nickel-metal-hydride can not load quickly at temperatures below 10 ° C, nor can they load slowly below 0 ° C. Some chargers are designed so that they Ladekoeffizienten and the ambient temperature change. Price considerations are not allowed to provide Apple PowerBook G4 12 inch Battery battery chargers for consumer electronics with temperature sensors.

At higher temperatures, the charge acceptance of nickel-based Apple PowerBook G4 Battery is drastically reduced. A battery that can hold at room temperature, a medium capacity of 100%, starts at 45 ° C ambient temperature, only 70%, and even only 45% at a temperature of 60 ° C. This highlights the poor performance of some car chargers in the summer!

Lithium-ion Apple PowerBook G4 15 inch (aluminum) Battery provide a good charging in to deep as well at high temperatures. Some cells allow charging with 1.0 C from 0 ° C to 45 ° C. Most lithium-ion cells, however, prefer a lower charge current when the temperature at 5 ° C or falls below. Must be dispensed on the loading below the freezing point, as a coating can be effected by lithium metal.

The lead-acid Apple PowerBook G4 17 inch Battery is not very sensitive to extreme temperatures, as we all know, on the basis of experience with our car batteries. Part of this tolerance is the inertia of lead-acid systems are attributed. Some battery models allow a shop below the freezing point with a small charging current, while others are damaged, and provide only reduced capacitance values, and life expectancy is shortened.

To improve the loading performance of lead-acid Apple PowerBook G4 17 inch Battery at low temperatures and prevent thermal effects during the warm-up, it is important to monitor the charging voltage limits to be set. An installation of this measure can extend the life expectancy of a battery up to 15%. General guidelines recommend making a correction of about 3mV per cell per degree Celsius. The voltage correction has a negative coefficient, ie The threshold voltage decreases when the temperature rises.

Heat kills the Apple MacBook Pro 17 inch Battery! The warmer the cells shorten, the life expectancy. Higher temperatures may not always be foreseen, especially during a fast charge. It must, however, attempt to keep these periods as short as possible. While 45 ° C is temporarily tolerable, begin a battery from 50 ° C damage is increasing. Moreover, cells are warmer in the interior of a battery, always a few degrees when the temperature of the battery case.
Ultra Fast Chargers

Some manufacturers of chargers promise amazingly short loading time of 30 minutes or less. With well-balanced cells and moderate temperature can nickel-cadmium VGP-BPS10 s batteries, which are designed for fast charging, are being charged in a very short time. This is achieved with a simple increase of the charging current during the first 70% of the charge cycle.

The article Via battery blog

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Avoid frequent full discharges because this leads to additional power consumption of the backup battery. Frequent partial discharges with many charges are better for lithium-ion laptop battery than one total discharge. Charging a partially discharged lithium-ion battery, the battery does not hurt, since no memory effect occurs. (In this respect, lithium-ion differs) of nickel-based batteries. The short battery life in a laptop is justified by the heat rather than through many charge / discharge cycles ..

Although free from memory, it should at lithium-ion batteries are only aware after 30 cycles, a full discharge is to calibrate the Toshiba pa3384u 1brs Toshiba pa3107u 1brs battery with the fuel gauge too. The discharge of the battery with the device serves this purpose. If this is ignored, the fuel gauge is crucial unreliable. The battery life will not be affected.

Lithium-ion Apple a1057 A1012 batteries should be kept cool. Hot cars are to be avoided. For longer storage, the battery should have a charge of about 40%.

Consider removing the iBook G4 14 Battery battery from a laptop when it is fed from the mains. (Some laptop manufacturers are concerned about dust and moisture accumulating inside the battery compartment).

Abstain from the purchase of a replacement MacBook Pro 15 Battery battery for later use. Note the date of manufacture. Do not buy old batteries, even if they are offered at reasonable prices.

The article Via Battery blog

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Dell’s first model in its revamped consumer notebook range, the mainstream Inspiron 5100, is different both inside and out. Gone is the buttoned-down grey case, to be replaced by a two-tone ‘Venice blue and moonlight silver’ design. Also a little mistake is that the Dell inspiron 5100 battery is too heavy to make the notebook a little importable.

Last Saturday I went to a schoole to do a PPT lecture. So I should buy a battery replacement for the trip. I just use the battery a little so I do not decide to buy a expensive Dell original one or buy a replacement from some other manufacturers. I searched the “Dell inspiron 5100 Battery” in Dell.com and Amazon .com and found many interesting customer reviews.

The picture just from a online shop : www.battery4.us

The Dell Inspiron 5100 battery specs :
Technology : 12-cell lithium ion
Voltage: 14.8V
Capacity : 98Wh
Max Recharge Cycles : 500
Weight: 722.91 g
Fits Model : Inspiron 1100 Battery , Dell inspiron 5100 Battery

From the below specs you can see that the laptop battery is a big and heavy battery with 12 cells. It also can last 3-4 hours showing the PPT documents ( I have test that). In all the battery is not a good choice as its weight (same as the adapter and lines). Let me see the customer reviews of the Original one and replacement.

The original One review:

This Inspiron 1100 Battery worked first time. Two batteries from cheaper sites didn’t work at all and we had the duty of returning the defective batteries. Dell’s was more expensive but worth it!!

VERY EXPENSING! Double the cost of a car battery. But you need it if you want your older computer to be portable. My new lithium-ion battery for my dell inspiron 1100 laptop has a 2 hour and 15 minute capacity.excellent! that’s all the time i need for wireless.

The Dell inspiron 5100 battery replacement from Amazon :

Ordered this Dell Inspiron 5100 Battery for my laptop. Arrived and it was dead. Contacted company to return it. Communication on how to return the product was timely, but when I got a replacement battery that was dead too. I was able to return it and even though I got all my money back in full it was a lot of headache going back and forth with the emails and having to twice make a trip to the post office to ship it back. It took a over a month to finally close this issue. Even though I got all my money back in full and the emails on the status was very communicative it was a pain. It took two dead batteries to be delivered to a customer before an email from customer service stated that maybe the batch was bad and it needed to be looked into.

The price was right, the quality was great, and it arrived quickly. Far less expensive than buying from Dell. Thanks! Battery works perfectly, fits perfectly and lasts longer then the factory battery ever did. It is rater higher too.

The article Via Laptop batetry blog

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As we all know, apple produce the three Macbook Pro notebook : Macbook Pro 13″, Macbook Pro 15″, Macbook Pro 17″. They are named for their LCD screen width, but they are not only differ by LCD screen width but also have their own feartures. Now let me introduce the features of each Macbook Pro notebook. Specially need to know this the Macbook Pro 13″ is the newst notebook of Macbook series.

Apple 13-inch Macbook features

Precision aluminum unibody enclosure.
Machined from a solid piece of aluminum, the new MacBook not only looks stunning, it’s also thinner, lighter, greener, and more powerful than ever. Also we call it Apple Macbook Pro 13".

LED-backlit display
The ultrathin 1280-by-800-pixel LED-backlit display shows off your digital media perfectly. And it’s as easy on the environment as it is on the eyes: The gorgeous glass and aluminum enclosure is arsenic- and mercury-free, and LED technology makes it more power efficient.

Advanced NVIDIA integrated graphics
Experience the most powerful MacBook graphics ever. With a new NVIDIA GeForce 9400M processor, the new MacBook delivers up to 5x more graphics performance, so you can immerse yourself in lifelike 3D games.

All-new, smooth glass Multi-Touch trackpad
Its redesigned with even more room for even more gestures. Now the entire glass trackpad is also the button, so its clickable everywhere.

Apple 15-inch Macbook features

Precision aluminium. The new gold standard
Carved from a single block of aluminium, the new MacBook Pro unibody enclosure is slim and streamlined with a soft-brushed surface and stunning contours.

Brilliant brilliance.
The moment you open your MacBook Pro 15 battery youre greeted by glorious, full screen brightness. But thats only one gleaming quality of the glossy LED-backlit widescreen display. The picture is brilliant and sharp from corner to corner.

Graphics in full force
The new MacBook Pro reaches a new level of high-speed, high-end game-playing power. Not to mention pure performance for graphics-intensive applications like Aperture and Motion.

Even the keyboard is advanced
The Apple Macbook Pro 15" rigid aluminium keyboard webbing has been cut precisely to hold the keys. And the keys are curved to perfectly fit fingers.

Apple 17-inch Macbook features

The longest-lasting Mac notebook battery ever
The Apple Macbook Pro 17 battery in the new 17-inch MacBook Pro lasts up to 8 hours on a single charge1 and can be recharged up to 1000 times2 compared with only 200 to 300 times for typical notebooks. Combined, these advancements offer a dramatic improvement in battery lifespan: more than three times the lifespan of typical notebook batteries up to five years.

2.3 million pixels of perfection
With the high-resolution LED-backlit widescreen display on the 17-inch MacBook Pro, you get desktop-quality colour in an Apple notebook for the first time. The moment you open your MacBook Pro, youre greeted instantly by full, corner-to-corner screen brightness. The 1920-by-1200-pixel resolution (133 pixels per inch) means you can view more palettes and windows or watch HD video in its native 1920-by-1080 resolution.

Graphics in full force.
The MacBook Pro reaches a new level of high-speed, high-end game-playing power. Not to mention pure performance for graphics-intensive applications like Aperture and Motion. Use the new NVIDIA GeForce 9400M integrated graphics processor for great everyday performance with up to 8 hours of battery life.

Precision aluminium. The new gold standard.
Carved from a single block of aluminium, the new unibody enclosure is slim and streamlined, making this MacBook Pro the worlds thinnest and lightest 17-inch notebook just 0.98 inch thin and 6.6 pounds. But its not just for looks as its MacBook Pro 17 battery.

Now we know the Macbook Pro series laptop are Precision aluminium and pretty interface, whats the difference between them?

All the data are from : Apple.com

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