Knowledge of mobile laptop batteries

First post by: www.itsbattery.com

Notebook computer equipped with the original IBM 92P1087 Battery, after a period of time after use, there will inevitably be the case of standby time. Some users said: “with repeated charge-discharge depth approach, be able to resume the performance of the dell Gd761 battery, thereby extending the battery life,” I believe that such a relatively one-sided.


We must correctly understand the issue, was first used in laptop battery types start. As we all know, in 1995, before the production of notebook computers are basically used nickel-cadmium batteries to power. This battery in the use of, if not the correct way of charging and discharging, the battery will have a “memory effect”, thereby reducing the battery’s actual capacity, the elimination of such a “memory effect” is the best way to repeatedly charge and discharge depth way. With the emergence of nickel-hydrogen batteries, IBM Laptop Battery capacity has significantly improved, but the “memory effect” did not completely eliminate the shortcomings.


In recent years, lithium-ion batteries in notebook computers has been rapidly increasing, due to lithium-ion battery has basically eliminated the “memory effect” problem, it has repeatedly used the depth to restore the battery charge and discharge performance of the method does not apply. But lithium-ion battery is why there will be capacity to reduce the problem? Have a fundamental reason for this situation, is used in notebook computers and the original lithium-ion battery in the built-in battery management systems.

Battery Management: At present in notebook computers, almost all adopted the “battery management” and “charge-discharge control” of two chip-level management systems. The “dell Gd761 battery management chip” placed in notebooks inside the chip registers in memory of the computer used in lithium-ion battery capacity, operating temperature, ID serial number, charge and discharge status, charge and discharge the accumulated number of other important information. The data information in the use of process, the need to constantly refresh the actual situation. The Laptop Battery built-in “charge-discharge control chip” the most important function, that is, surveillance, control of battery charging and discharging the whole process and be documented.


Charge: Lithium-ion batteries throughout the charging process is divided into “fast charge constant current” and “constant current reduced charge” in two stages. The so-called “constant current fast charge” means the charge has just begun when the charge current and charge voltage to follow a fixed battery terminal voltage gradually increased until they reach their nominal voltage charging mode. When the battery terminal voltage has reached the standard value, the control chip will be automatically transferred to the “constant charge current regressive” stage, when the charging voltage will no longer continue to rise, and then follow the battery charge current capacity rising gradually diminishing, and eventually reach zero, so they completed a full DELL 08K8194 Battery charging process.


At the same time, in the charge generated by the process of charging voltage, current and time data curve, will be recorded in the battery inside the “charge-discharge control chip” in memory. “Battery management chip” is through access to these data, calculated by sampling data such as battery capacity, which is, in Battery Information in numerical Wh read.


Fixed: After repeated charge and discharge the battery after use, and its built-in chip and charge and discharge data will of course be changed. If at this time “battery management chip” has not been the opportunity to read the newer, more complete data, it calculated the battery capacity of course will not be accurate to the users the feeling seems to be a reduction of the capacity of the battery, and in fact the actual capacity of the battery has not really reduced. Some brands of notebook computer management software built-in rechargeable working principle, is in the charge process refresh “charge and discharge control chip,” the data in memory, thus ensuring “battery management chips,” the correctness of IBM 08K8196 Battery calculations.


If you have a close look notebooks Manual will be found that “a month in the use of computer time, should make a full battery charge and discharge operation” note. Its main purpose is to use the depth of charge and discharge the way to amend the charge and discharge control chip register data in the curve, so that Gd761 battery charging control and nominal capacity and battery coincide with the actual situation so as to arrive at the correct battery capacity values.

laptop batteries on its manufacturing materials divided into three categories: nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion battery. One nickel-cadmium battery is the first generation of laptop batteries, it is the capacity of low memory effect, the need to maintain regular discharge capacity, and material existence of environmental pollution, the current battery has been basically eliminated. Second-generation high-capacity nickel-hydrogen batteries, no memory effect, very little material of environmental pollution, it is customary to call the environmental battery. At present, the development trend of IBM 92P1102 Battery is a lithium-ion battery, the advantages are:


(1) no memory effect, no need to discharge, the use of a long time.

(2) high voltage. Usually single lithium-ion apple a1079 battery voltage to 3.6V, nickel-metal hydride, nickel cadmium battery voltage of 1.2V, a difference of 3 times.

(3) small size, light weight, high specific energy. Lithium-ion battery energy than nickel-cadmium batteries up to 2 times more. With the same capacity compared to nickel-hydrogen batteries, size can be reduced by 30%, weight reduced by 50%.

(4) long life. High-quality lithium-ion IBM 92P1077 Battery life of up to more than 1,200, far higher than other types of batteries.


(5) rapid charging safety. Lithium-ion batteries due to the use of special treatment, thus allowing for two hours in the rapid adequate electricity, but also greatly enhanced security features.

(6) allow the working temperature range. Lithium-ion apple a1079 battery can be between -20 ℃ -60 ℃ work. High-temperature discharge performance is superior to other types of batteries.

Well, how to identify genuine and lithium batteries do? In the non-professional conditions, can be used the following methods: equal-capacity batteries, lithium batteries than the nickel-metal hydride, nickel cadmium batteries to light touch; exclusive use lithium-ion battery charger for rechargeable batteries, if the IBM 92P1073 Battery charging process of fever, then nickel hydrogen and nickel-cadmium batteries, if no significant changes in temperature, it is lithium-ion battery; the battery positive and negative, “the moment” after the use of short-circuit, such as the battery, “no electricity” is the lithium battery, if still “electricity” is a nickel-metal hydride, nickel cadmium batteries.


In the use of lithium batteries should be noted that some time after the battery is placed into the dormant state, when the capacity is lower than normal, the use of time has also come to shorten. After 3-5 times rechargeable battery can be activated to restore normal capacity.

When the battery has no intention to short-circuit when the internal lithium battery protection circuit will cut off the power supply circuit in order to ensure the safety of users, the battery out to re-charge could be reinstated.


Buy lithium batteries, should choose to have after-sales service, international, national identity brand batteries, such batteries using high quality raw materials, with a sound system for the protection circuit, shell exquisite, wearable, a security chip and laptop with the good, you can to achieve the effect of good IBM 08K8199 Battery communications.