Acer extensa 2480 battery
TheWhether digital camera, or radio, Walkman, batteries of all equipment, power, battery performance is good or bad decision to use the equipment performance. battery structure is different, different size, capacity, vary considerably, that is the same size battery, due to the different models, different manufacturers, capacity not the same. Take our most popular AA size batteries (5 batteries), the early nickel-cadmium battery capacity is 500mAh, modern nickel-cadmium battery capacity is 850mAh, while the same size nickel-metal hydride batteries have greater capacity, at 1100mAh ~ 2100mAh between.
MAh battery capacity is calculated, you can be understood as in how many mA (mA) current, discharge 1 hour. For example, 1000mAh means the battery can 1000mA discharge current of 1 hour and such a large capacity. Thus, if the load (with electrical) power consumption is 100mA, the battery can discharge 10 hours, if the load current is 200mA, the battery can be used 5 hours, and so on. http://www.laptopbatteries-
Battery principle is a chemical reaction produces electricity, two kinds of metal materials under the influence of the electrolyte produce current, which we in secondary schools have learned in physics class too. Different types of battery terminal voltage is not the same as dry-cell batteries 1.5V, silver oxide battery 1.55V, silver mercury battery 1.3V, nickel-cadmium batteries and nickel-metal hydride battery 1.2V, lead-acid battery 2V, disposable lithium batteries 3V, rechargeable lithium battery 3.6V. With the electrical supply voltage is different from the use of battery types and sessions are also different. For example, the early use of chewing gum Eva Walkman-type lead-acid batteries, the working voltage design 2V, new Sony Walkman gum use nickel-cadmium batteries, terminal voltage of 1.2V, a modern multi-use digital camera lithium battery, the working voltage of up to 7.6V, needed two series of secondary lithium battery-powered (though monomer, but inside the shell encapsulates the two rechargeable lithium batteries), and most modern radios were designed to be able to use dry batteries or Ni-Cd, Ni-MH batteries, from 2 ~ 4 cells in series power supply, power supply voltage can be changed within a certain range.
The battery can no longer be a one-time charge, such as batteries, alkaline batteries, silver oxide batteries, silver and mercury battery, a lithium battery. After the exhaustion of their power can only be scrapped. Many people tried to charge these batteries, design a variety of chargers, writing a large number of articles, I too, have made great efforts to this end, has done hundreds of times for various battery tests, the results of little effect, charging after the battery capacity of even half of the new can not be achieved, and then discharge again soon dried up! But today there are still many articles, make such a deceptive theory and charging products. http://www.laptopbatteries-
With the development of technology, battery technology advances, although this progress compared to other electrical appliances to become too slow. Nickel-cadmium rechargeable batteries have a long history, and its relatively complete variety of specifications, but most of the cylinder-shaped, sizes, capacity different. This battery discharge performance than the dry well, resistance is relatively low, allowing large current discharge, but the memory strong, normal life at between 400 to 1,000 times. In recent years a large number of developing nickel-metal hydride batteries have greater capacity, lower resistance, more suitable for large current discharge, the memory feature much smaller than the nickel-cadmium life 1000 times more in charge and discharge, the price is not much expensive. Therefore, to replace the nickel-cadmium nickel-metal hydride is an inevitable trend, is now rarely seen on sale of the nickel-cadmium batteries. Rechargeable lithium battery is the latest generation of advanced batteries, it has a terminal voltage, high-capacity maximum, ultra-low resistance, stable performance, long life characteristics (charge and discharge 1000 and above). But its price is relatively high, mainly used in advanced electrical appliances, such as laptop computers, mobile phones, handheld computers, digital cameras and so on.
Memory characteristics of the battery is that, if you often let the battery discharge into the left half of the capacity to call it charge, then the course of time of its actual capacity would be reduced. There is no memory characteristic of the battery can be added at any time for its electricity, its capacity would not be any changes. At present, only lithium battery claimed there is no memory characteristic of the battery, but in fact any chemical batteries have a certain degree
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