battery technology is progressing
MAh battery capacity is calculated, you can be understood as the number of mA (mA) discharge current for 1 hour Camcorder Battery Digital Camera Battery. For example, 1000mAh battery refers to 1000mA discharge current in 1 hour and so much 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.
The principle is the chemical reaction cell to generate electricity, two kinds of metal material in the current under the action of the electrolyte, which in high school physics class, we both had learned. Different types of battery terminal voltage is not the same battery as 1.5V, silver oxide battery 1.55V, silver mercury battery 1.3V, Nickel-cadmium batteries and nickel metal hydride batteries to 1.2V, lead-acid battery 2V, disposable lithium batteries as 3V, secondary lithium batteries is 3.6V. Electric power supply voltage with different types of batteries used and the sessions are different. For example, the early use of chewing gum Eva Walkman-type lead-acid battery design voltage 2V, new Sony Walkman gum use nickel-cadmium battery terminal voltage is 1.2V, the modern multi-use digital camera lithium battery, high voltage 7.6V, requires two series of secondary lithium battery powered (although monomer, but within the package in case the two rechargeable lithium batteries), and most modern radios are designed to use the dry batteries or nickel cadmium, nickel-hydrogen battery, from 2 to 4 cell series power supply, power supply voltage can be changed within a certain range APPLE A1189 battery.
Can no longer charge the battery once, like batteries, alkaline batteries, silver oxide batteries, silver mercury battery, a lithium battery. After the exhaustion of their power can only scrapped. There are many such people try to charge the battery, developed a variety of charger, writing numerous articles, I too, have made great efforts to this end, done hundreds of times on a variety of battery test results little effect, after charging, the battery's capacity with a new half can not be achieved, and then discharge it quickly dried up! But today there are still many articles, make such a theory and charged with fraudulent products.
With the development of technology, battery technology is progressing, although this progress compared to other electrical appliances to become too slow. Nickel-cadmium rechargeable battery has a long history, and its relatively complete specifications, but most of the cylinder-shaped, sizes, different capacity. This battery discharge performance better than the dry, low internal resistance, allowing a large current discharge, but the memory is strong, normal life expectancy is between 400 to 1000. Developed in recent years a large number of nickel-hydrogen batteries have greater capacity, lower resistance, more suitable for large current discharge, the memory characteristics of Ni-Cd is much smaller than life and more charge and discharge in 1000, the number inexpensive. So, replace the nickel cadmium nickel metal hydride is an inevitable trend, is now rarely seen on sale of nickel-cadmium batteries. Secondary lithium batteries 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 more than 1000). But its price is relatively high, mainly used in high electrical appliances, such as notebook computers, mobile phones, PDAs, digital cameras and so on. APPLE M8403 battery APPLE A1078 Battery APPLE A1079 battery
Memory characteristics of the battery so, if you always let the battery discharge to the left half of the capacity give it charge, then the long time, its actual capacity is reduced. No memory characteristic of the battery can be added at any time for its power, its capacity will not be any changes. Only lithium battery claimed to have no memory characteristic of the battery, but, in fact, any chemical battery has a certain
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