1 brief introduction of mobile phone charger
Mobile battery charger, also known as: mobile power supply and charging treasure, is made up of a stable power supply (mainly regulated power supply, providing stable working voltage and sufficient current) plus necessary constant current, limit pressure, time limit and other control circuits. Original charger (line charging) marked output parameters: for example, output 5.0V/1A, output 5.0V/1500mA-11200... It refers to the relevant parameters of the internal stable power supply. With this in mind, you will know that a good mobile charger can easily be turned into a high quality power supply.
The charger of lithium ion (Li-Ion) battery is used in the constant current limited voltage charging system. The charging current is usually about C2, that is, the charge rate of two hours is adopted, for example, the 500mAh battery adopts the 250mA charge for about two hours to reach 4.2V and then the constant voltage charge.
2 types of mobile phone charger
1, seat charger
The seat charger is easy to carry and convenient to use. It has been welcomed by the home, but now the seat charger has many brands, the quality is uneven, and the purchase should be paid more attention.
2. Travel charger
The travel charger is small and easy to carry, so there are many users using it.
3. Car charger
The car cigar battery charger is used as a power outlet to directly charge the mobile phone. Because the voltage supplied by the car is low, there is only overload protection circuit inside the charger. [detail >]
3 mobile phone charger
1. Weight. Generally speaking, the heavier the charger, the more electronic components used by the charger, to a certain extent, the better the quality of the charger. This method is the most intuitive and effective.  When choosing, it is best to take several different brands and different types of seat type chargers and weigh them by hand. After comparison, the advantages and disadvantages are easy to compare.
2. Function. The function of seat charger mainly depends on its IC (smart chip). At present, IC has developed to the third generation. After the improvement of the first two generation of IC, the seat charger used in the third generation of IC is more perfect, but because of the fierce competition in the market, many manufacturers will often use the lower cost second generation IC to make the seat charger and sell the products manufactured by the third generation of IC. Therefore, first of all, we need to understand the difference between the functions of the three generation of IC. If the charger is used for the second generation of IC, each charge should be put on the socket first, and then the battery is placed on the charger card seat after its self inspection. Otherwise, the charger will not be able to charge the battery normally. Therefore, when purchasing, it can intuitively use a battery which is not enough electricity to test the IC used by the seat charger which belongs to the next generation.
3. Seat charger is usually divided into two fixed pins and two phase / three phase variable pins. When buying, it is better to choose two phase / three phase variable pins, which will be more convenient in future use. In addition, try to pull the plug of the seat charger when buying. If you can easily pull out the pins, do not buy such products.
4. Heat. When the seat charger is working, the internal transformer will generate some heat. Generally speaking, the better the quality of the transformer, the lower the heat generated. As long as the temperature of the charger is less than 30 degrees during the working process, that is, if you touch the tiny heat with your hands and do not burn it, you will see it as a standard. Theredddfore, we should choose several different seat charger in order to make them work for a few minutes, and then feel the heat. We should choose a relatively low temperature product.
5. Production process and raw materials. If the conditions are allowed, the seat charger can be dismantled and examined for the quality identification of the circuit board, the quality of the parts and the welding process. [detail >]
4 maintenance of mobile phone charger
1. Static electricity when cleaning. Clean the charger and charging interface regularly. When cleaning, use a damp cloth or an antistatic cloth.  Do not use dry cloth (electrostatic charge)!
2, waterproof and moisture-proof. As an electronic product, inadvertent inflow or exposure to moist air for long periods of time will cause varying degrees of corrosion or oxidation to the electronic components of their internal components.
3, prevent the shock from falling. Mobile phone charger is actually a fragile component, and internal components can not afford to beat. In particular, we should avoid landing in the process of using. Do not throw, knock, or shake the charger. A rough treatment of the charger will destroy the internal circuit board
4, prevent cold and prevent heat. Do not put the charger in the place where the temperature is too high. High temperature shortens the life of electronic devices, destroys the charger, and causes some plastic parts to deform or melt. Do not store the charger in the too cold place. When the charger works in an undercooled environment, when the internal temperature rises, the charger will generate moisture and damage the circuit board.
5. Anti - chemical products. Do not use strong chemicals, detergents or strong detergents to clean the charger. Remove the appearance of the charger stains can be washed with a small amount of alcohol washed with cotton.