Laptop Battery Knowledge Q & A

Q1: usually said 3-cell, 6-cell battery refers to what? And does it relate to battery capacity?

A: 3-cell, 6-cell is the number of cells in the batteries. The more cells the greater capacity of the battery is, and can be used for a longer time.

Q2: What types does Laptop battery have?

A: There are nickel-chromium batteries, nickel-metal hydride batteries, lithium batteries, they are generally expressed as: Ni-Cd, Ni-MH, Li. In recent years, there appears a fuel cell in the laptop field. Today’s laptops generally use lithium batteries, but a few models still use the elimination nickel-metal hydride batteries, consumers can identify from the Dell GD761 battery tag.

Q3: Why does the manufacturer only for one-year battery’s warranty?

A: For the short life of lithium ion. The chargeable number of ordinary lithium is only 400-600 times, specially modified products for 800 times, scrapped after using for two years.

Q4: Why battery using time is less than the manufacturers’ nominal time?

A: The test conditions are not the same. Some manufacturers use 8-cell hp 367759-001 battery for testing, but to the user is 6-cell battery; some manufacturers turn off all the procedures, lowering the LCD screen brightness, disable the interface by means of power to detect the use of time, which in everyday applications simply can not be achieved; some vendors only use software testing, software may lead to errors.

Q5: what should pay attention to about battery use and preservation?

Answer: Pay attention to these issues: the beginning of several charge must be filled with more than eight hours to fully activate the lithium apple A1061 battery; be careful not to over-discharge; best not to use the power adapter and battery at the same time.

Save attention: You’d better take out the battery each month to charge; Do not charge full when save the battery, charge to 40% ~ 50% of the electricity is suitable; stored in a dry cool place.

Battery Label Knowledge

The general contents of the label outside the battery pack are:

1. The Laptop battery manufacturer, model (batteries produced by regular manufacturers certainly have these two labels);

2. Types of batteries (sort based on the internal battery types);

Common used are Li-ion lithium-ion battery, Ni-MH battery, lithium-polymer battery, and rarely to see Ni-Cd (nickel-cadmium batteries) and the latest fuel cell.

3. Nominal Voltage;

General for 10.8V (11.1V) or 14.4V. Lithium-ion Dell KD476 battery, for example, we all know, the voltage of one lithium-ion battery is 3.6V, which of course can not reach the voltage notebook needed, so commonly used series approach. If the rated voltage is 10. V, it is a series of three, four series voltage becomes 14.4V, but some of the secondary battery in the factory calibration of single lithium-ion battery voltage is 3.7V, so the voltage to string three together is 11. 1V. If 1.2V Ni-MH battery, then use 9 single series to 10.8V, in order to achieve the laptop work required operating voltage.

4. Nominal Capacity;

In general, single Ni-MH hp PB991A battery capacity is larger than a lithium-ion battery, a 18650- Ni-MH battery capacity can achieved 4200 ~ 4500mAh, while the commonly used single 18650 lithium-ion battery capacity is 1500 ~ 2000mAh, so if laptop battery used Ni-MH batteries , only put the batteries in series to improve the battery voltage. The lithium-ion batteries are different for the battery manufacturer’s technological gaps, if the laptop battery use the lithium-ion batteries, commonly used three parallel to increase battery capacity, three parallel can be achieved in general 4500 ~ 6000mAh.

5. Battery Cautions:

Generally above the battery would be limited using environment label, using cautions, and toshiba PA3284U-1BRS battery recycling label.

Laptop battery frequently encountered problems

Q: How to preserve the battery if I don’t use for a long-term?

A: Charge or discharge to about 50%, and then placed in dry, temperature of 15 to 25 degrees Celsius to preservation, either the temperature is too high and too low are easy to accelerate cell aging.

Q: Is that ok if Laptop battery is not removed when using the power supply?

A: It does not matter, the laptop battery has a protection circuit, it will not continue to charge when full.

Q: My battery is now run only a very short time, how should I do?

A: If you’ve been in the frequent use of the battery, then it belongs to cell aging, which can not be avoided, you can only consider to change a new IBM ThinkPad R32 battery or replace batteries; If you did not use battery a long-term, may also lead to this phenomenon, this time need to completely discharge (until fail to boot up) and then full recharge, repeated several times to activate the battery.

Q: Could I use other laptop’s power adapter?

A: No, there are three obstacles, the first is the notebook computer manufacturers use various different voltage, such as IBM are 16V, COMPAQ mostly 18.5V, SONY part of the model is 19.5V, they are inconsistent. The second is different laptops need different current, from 2A to 5.4A, a small machine needs small current. The third is the various manufacturers notebook power adapter interfaces are different, it is difficult to general use. Therefore, at present there hasn’t a common power adapter to all notebooks. 

Q: How to charge the new machine? How do I maintain the battery?

A: Lithium Dell Inspiron E1705 battery need to maintain a certain electromotive force to maintain its internal chemical activity. Therefore, you need to achieve full charge and discharge, in general, the first three times can be a period of about six hours of charge time, charge electric to 100% if there is no time. To avoid point charge, charge timely when less than 10%, and not to be exhausted, that would be bad to the battery; also try not to charge when higher than 60%. Battery don’t use for a long time should applied to about 50% of electricity and preserve at room temperature and dry environment.

Q: For the first use of the battery, should I charge 12 hours the former three times?

A: This is completely unnecessary, because the current notebook computers have improved power management circuitry and charging management system, when the hp Pavilion dv6000 battery reached saturation, the control circuit will automatically switch to the circuit state, so even if charge a long time is also to no avail.

Q: In order to prevent memory effect, we should run out before charge?

A: Discharge the battery is not only unnecessary before every charge, but also harmful. Practice has proved that the depth discharge of the battery will shorten the life, it is recommended to charge the battery when about 10%. When the sony VGP-BPS2A battery power is still more than 30%, you’d better not to charge, because the memory effect more or less does indeed exist.