For å•¥ mobile phone power to display in milliamps

"Even junior high school students know that the unit of current is ampere, the unit of voltage is Ford, and the unit of current is Coulomb. Then why do mobile phones and charging treasures say how many milliamps are their batteries?"
Why do mobile phone batteries and charging treasures always use milliamps to display them? There are many netizens who have doubts about this. In fact, this is not the name that mobile phone manufacturers or charging treasure manufacturers just pick up. The reason is because mA is the most important indicator of lithium batteries. mAh is the standard method that batteries have long existed.
This is based on GB-T1828 "General Specification for Lithium Ion Batteries for Cellular Phones" to define the rated capacity of mobile phones, that is, the battery capacity indicated by the manufacturer, which means that the battery is operated at an ambient temperature of 20 °C ± 5 °C at 5 ° efficiency. The amount of electricity supplied when discharging to the end voltage is expressed in C5 in units of Ah (ampere-hours) or mAh (mill-hours).
In general, a 1000 mAh battery means that 1 h can be used at a discharge current of 1 A, and 0.5 h can be used at a discharge current of 2 A. The basic unit of the amount of charge is Coulomb, 1 coulomb = 1A * 1s = 0.277 ~ mAh = 6.25 x 10e18 elementary charge. The capacity of the battery can be either Wh or mAh, but mAh is more intuitive. When facing a battery with different voltages, it is more convenient to compare the capacity with Wh. Therefore, in general, the battery manufacturer also marks Wh on the battery. And mAh.
mAh is the same type of Coulomb, which means how much charge is contained in the battery. When the device uses a standard battery, this is the most convenient and **. The use of mAh is mainly for the convenience of calculation, so that the user can calculate the usage time more intuitively. For example, the user only needs to know how many milliamps to use, and can calculate the approximate usage time.
So in this respect, battery manufacturers still use the wrong unit in terms of the standards for using and storing power. This method is still good, allowing the public to more intuitively calculate the power usage time.
In summary, 1 A = 1000 mA, the mA is only a current measurement unit under amps. The choice of such a measurement method is simply because the battery capacity itself is low, plus the calculation of power and usage time. At the time, the mAh will be simpler and more direct to show the usage time of the power storage. Therefore, there is nothing wrong with the name of mAh in this respect.

Fine Chemical Intermediates

Fine chemical intermediates is the general term for the production of fine chemicals industry. It is one of the most dynamic emerging fields in the chemical industry today, and is an important part of new materials. Vigorously developing fine chemical industry has become the strategic focus of the world to adjust the structure of chemical industry, upgrade the level of chemical industry and expand economic benefits.

 

The common characteristics of fine chemical intermediates are:

(1) many fine chemicals intermediates, rapid updates, and the need for continuous development and application of products, so the cost of research and development is also great. The quality of the product is stable and the purity of the original product is high. After the compound, the product should not only guarantee the physical and chemical index, but also pay more attention to the use performance. It often needs to be equipped with a variety of testing methods for the use of the test. (3) the process of fine chemical intermediates production is different from that of general chemical production. The whole process of production not only includes chemical synthesis, but also includes the processing and commercialization of dosage forms, which are made up of these two parts. Mostly in batch mode and small batch production of [1]. Although the production process is long, the scale is small, and the investment cost of unit equipment is low, precise engineering technology is needed. 5. The technology of the product is confidential, and it is an exclusive operation. It attaches importance to market research and market demand, and has applied technology and technical services.

 

Fine chemical intermediates Attention:

[ operation notice]

Closed operation, local exhaust. Operators must undergo special training and strictly abide by the rules of operation. It is recommended that operators wear self-priming filter respirators, wear chemical safety glasses, wear protective clothing and wear rubber gloves. Keep away from fire and heat sources. Smoking is strictly prohibited in the workplace. The use of explosion-proof ventilation systems and equipment. Avoid producing dust. Avoid contact with oxidants and alkaloids. Light handling and unloading should be carried out to prevent packing and container damage. Equipped with corresponding varieties and quantities of fire fighting equipment and leakage emergency handling equipment. The empty container may remain harmful.

[storage notice]

Store in a cool, ventilated storeroom. Stay away from fire and heat. Keep the container seal. It should be kept separately from oxidants and alkaloids. Equipped with the corresponding variety and quantity of fire equipment. The storage area should be equipped with appropriate material collection and leakage.

 

Fine Chemical Intermediates

Fine Chemical Intermediates,Essential Chemical Aniline,Organic Chemicals Dichloromethane,Fine Chemical Aniline

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