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Welcome To USB Phone World Blog
Sunday, May 20, 2012
Laptop computers have become one of the most important tools in the world while we should take efforts to be adapted to different work situations of laptops. Other than that, is there any ways to adjust the performance or make the whole device more suitable to us?

The ways to check the laptop work status in some primary aspects

Compared to taking any actions, it is necessary to have a thorough check on laptop system rate, memory space, configuration, temperature, last time and other aspects. Even so, it doesn’t mean that we need to pursue for too high level and we just need to meet our demands in regular use. Therefore, users can check if these accessories or programs have met the basic requirements.



The work principle of these compatible Dell Inspiron laptop batteries

As a matter of fact, lithium-ion laptop batteries are not only of great significance in standby time, the other relevant factors have greater influence on the actual performance. Among them, the internal circuits and control circuitry should be considered as the primary aspect to consider. And these two values are closely related to internal resistances that can figure out the aging status of the batteries.

The way for Dell Inspiron laptop batteries to save laptop life or improve the performance

Compared to used or old ones, the brand new battery for Dell Inspiron series has powerful functions to supply more output power to internal systems and accessories. Thereby, it can support the computer for longer time. Of course, to way to save power energy is also good for the lithium-ion batteries in real performance. To learn more about the battery maintenance tips of other details, please pay attention to the official blog of USB Phone World.

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by: USB Phone World
Thursday, October 20, 2011

Actually, the internal resistances have great influence on laptop battery in specifications, standby time, running temperature and so on. With time goes by, resistance value comes to be higher and higher while the output power of batteries will be reduced to some extent.


laptop battery

Different type of laptop battery has got different internal resistances with different electrochemical properties. Usually, we can indicate it by milliohm that is also related to the output electric current and output power value.


In the process of charging and discharging, the internal resistances will produce enough heat inside the lithium-ion batteries. However, it is not determined by a certain value but a relative magnitude. Therefore, what we need to care about it not the pure resistance but the relationship of output voltage, current and power capacity as well.


Now, let’s see some popular measurement methods to calculate the internal resistances.


DC discharge resistance test method – According to the physical equation, the test device will have a powerful DC current value and voltage as well. Therefore, we can learn about the internal resistance by U(volt)/I(mAh). The result is very accurate with difference within 0.1%.


internal resistances

Exchange impedance measurement of pressure dropping – Actually, the internal resistances are those of resources, we can apply a fixed frequency and current by kHz and mAh. Then we can take sample and handle by rectification, filtering and other ways. The process of measuring is very short to be of around millisecond.


In some cases, although the electric quantity of laptop battery if large enough, high internal resistances have prevented it from running smoothly. Once the resistance value comes to increase, it is really hard to reduce by ourselves even if with good usage methods. Therefore, the most effective way for us is to control and handle it before it has reached a dangerous level. Compared to wrong battery indicating information, higher internal resistances have more dangerous influence on the performance. That is to say, we need to calculate and judge if it is within a safety range. Those batteries that haven’t been used for a long period will also have very large internal contamination. Of course, if the value is too short is also dangerous as it is possible to cause short circuit. Please try to learn and use these ways to calculate your battery and take good care of it to have longer lifespan and better performance.

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by: USB Phone World

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