A charger usually refers to a device that converts alternating current into low voltage direct current. Chargers are widely used in various fields, especially in the field of life, which are widely used in mobile phones, cameras and other common appliances. The charger is a static converter which uses the power electronic semiconductor device to transform the alternating current of voltage and frequency into DC. In the field of battery operated or standby power supply, chargers have wide application prospects.
There are many chargers, such as lead-acid battery charger, test and monitoring of valve controlled sealed lead acid battery, nickel battery charger, Ni MH battery charger, lithium ion battery charger, portable electronic equipment lithium ion battery charger, lithium ion battery protection circuit multi power charger, electric car battery charger. Car charger, charger, charger and so on.

When charging the battery with a charger, it is necessary to select the charger with the appropriate specifications according to the charging instructions of the battery and connect it correctly. Otherwise, there will be electrical appliances damage or safety accidents. It is recommended to use intelligent charger because it is protected and perfected. In general, there is no accident.
Charger principle
All cell phone chargers are made up of a stable power supply (mainly regulated power supply, providing stable working voltage and sufficient current) plus necessary constant current, limit voltage, time limit and other control circuits.

The output parameters of the original charger (refer to line charging): for example, output 4. 4V/1A, output 5.9V/400mA... 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. For example, the output 4.4V can be used for 4.5V devices, and 5.9V can be used for 6V devices.

Chargers are classified by way of energy use
Ordinary charger: using ordinary household electricity and so on to provide energy through transformer.

Battery charger: it is designed to charge the battery or battery group, which is widely used in the market. The whole machine is small in volume, light in weight and convenient to move.

Solar charger: using solar panels to collect solar energy

Wireless charger: the principle of using electromagnetic coupling

Handy charger: use of manpower

Dry battery emergency charging: using 1 sections to several dry batteries, providing emergency charging, generally can provide more than ten minutes of electrical energy.
Chargers are classified according to the types of products used
Mobile phone charger

Notebook Charger

Electronic Car Charger

Large charger and so on

Camera charger

Electric toy charger
Chargers are classified by way of use
Senior business charger: business travel charger, charging speed is very fast and very safe, the price is slightly higher than the general charger.

Seat type charger: unique appearance, novel appearance, easy to carry, suitable filling capacity of 200-3000mAH lithium ion (LI-ION) nickel (NI-Mh) mobile phone batteries, built-in intelligent identification circuit, can automatically convert the charger output polarity for battery charging, the effect is good, the ideal partner Home Furnishing / Travel mobile phone;

USB charger: with USB output interface, to MP3/4, digital cameras and other charging;

Line charger: direct charge for general mobile phones;

Vehicle charger: charger based on universal power supply on vehicle.
Chargers are classified according to raw materials
Ni MH Ni Cd charger

Lithium ion battery charger

lead-acid battery charger
Military charger (Industrial charger)

Civil charger
The composition of the charger
1, shell

2. Input line, output line

3, circuit boards, heat sinks, various electronic components (capacitance, resistance, single chip, optical lotus, MOS tube, diode, triode, switch tube).

Usage method
First, the common sense of charging

Charging is an important step in the use of rechargeable batteries. Proper and reasonable charging is good for prolonging battery life. Barbaric charging will have great influence on battery life. Lithium batteries are basically encapsulated according to the individual products and are not common to each other. Therefore, each product also provides their own charging equipment. It is not common to use each other. As long as they are used in the use of their respective instructions, they can be used. Therefore, the introduction of battery charging mainly refers to Ni Cd batteries and Ni MH batteries. There are two ways to charge nickel battery and Ni MH battery, that is, "fast charging" and "slow charging" that we all know. Fast charging and slow charging are important concepts of charging. Only when we know fast charging and slow charging can we correctly master charging.

First, quick and slow charge is a relative concept. Some people have asked, charger charging current has 200mA, is it fast charging? The answer is not absolute. It should be answered that for some batteries, it is fast charge, but for some batteries, it is just slow charging. So how do we tell fast charging or slow charging?

For example, a 5 nickel hydrogen battery has a capacitance of 1200mAH, while the other section is 1600mAH. The capacitance of a battery is called 1C, so 1C is only a logical concept. The same 1C is not equal. When charging current is less than 0.1C, it is called trickle charge. As the name implies, it means that the current is very small. In general, trickle charge can charge the battery very well without injure the battery life, but it takes too long to use a trickle to charge, so it is rarely used alone, but is used in combination with other charging methods.

When the charging current is between 0.1C-0.2C, it is called