How long does the 18650 lithium battery charge at one time?

Advantages of the 18650 lithium battery:

1. Wide range of use;

(1). Electronic devices such as notebook computers, walkie-talkies, portable DVDs, instrumentation, audio equipment, model airplanes, toys, video cameras, digital cameras, etc.

2. Series connection;

(1). It can be combined in series or in parallel to form a 18650 lithium battery pack.

3. The internal resistance is small;

(1).The internal resistance of the polymer battery is smaller than that of the general liquid battery.

(2). The internal resistance of domestic polymer batteries can even be less than 35mΩ, which greatly reduces the self-consumption of the battery and prolongs the standby time of the mobile phone, which can fully reach the international standard.

4. There is no memory effect;

(1). It is not necessary to empty the remaining power before charging, which is convenient to use.

5. High security performance;

(1). 18650 lithium battery has high safety performance does not explode, does not burn; non-toxic, non-polluting.

6. Long service life;

(1). 18650 lithium battery has a long service life, and the cycle life can reach more than 500 times in normal use, which is more than twice that of ordinary batteries.

7. Large capacity;

(1).The capacity of 18650 lithium battery is generally between 1200mah and 3600mah while the general battery capacity is only about 800.

18650 is the originator of lithium-ion battery--a standard lithium-ion battery model that Japan SONY Company set in order to save cost. Among them, 18 means diameter is 18mm, 65 means length is 65mm, 0 means cylindrical battery.

The common 18650 battery is divided into a lithium ion battery and a lithium iron phosphate battery. The lithium-ion battery voltage is 3.7V, the charge cut-off voltage is 4.2v, the lithium iron phosphate battery has a nominal voltage of 3.2V, the charge cut-off voltage is 3.6v, the capacity is usually 1200mAh-3350mAh, and the common capacity is 2200mAh-2600mAh. .

lithium ion battery: Lithium-ion batteries have the advantages of light weight, large capacity, and no memory effect, so they are widely used. Many digital devices use lithium-ion batteries as power supplies, although their prices are relatively high. Said to be more expensive. Lithium-ion batteries have a high energy density, and their capacity is 1.5 to 2 times that of nickel-hydrogen batteries of the same weight, and has a very low self-discharge rate. In addition, the lithium-ion battery has almost no "memory effect" and does not contain toxic substances, which is also an important reason for its wide application. In addition, please note that the outside of the lithium battery is generally marked with English 4.2Vlithiumionbattery (lithium battery) or 4.2Vlithiumsecondarybattery (lithium secondary battery), 4.2Vlithiumionrechargeablebattery (rechargeable lithium battery), so users must see the appearance of the battery block when purchasing the battery. Prevent cadmium nickel and nickel hydride batteries from being mistaken for lithium batteries because they do not see the battery type. Lithium batteries are the same as 3.7V or 4.2V. It’s just that the manufacturer’s label is different. 3.7V refers to the platform voltage (ie, typical voltage) that is discharged during battery use, while 4.2 volts refers to the voltage at full charge. Common rechargeable 18650 lithium battery, the voltage is 3.6 or 3.7v standard, 4.2v when fully charged, which has little to do with the power (capacity), 18650 battery mainstream capacity from 1800mAh to 2600mAh, (18650 power battery capacity) More than 2200~2600mAh), the mainstream capacity even has the standard 3500 or 4000mAh or more (remind everyone, the domestically produced batteries with a nominal 3350mAH or higher in the market are likely to be fake, the current mass production capacity in China. It is 3350mAh.).

It is generally considered that the lithium battery no-load voltage is below 3.0V and it is considered that the power is used up (the specific value needs to look at the threshold of the battery protection board, such as low to 2.8V, also 3.2V). Most lithium battery discharges cannot put the no-load voltage below 3.2V, otherwise excessive discharge will damage the battery (usually the lithium battery on the market is basically used with a protective plate, so over-discharge will also cause the protection board to detect To the battery, it is impossible to charge the battery). 4.2V is the highest limit voltage for battery charging. It is generally considered that charging the lithium battery no-load voltage to 4.2V is considered to be full. During battery charging, the battery voltage gradually rises to 4.2V at 3.7V, and the lithium battery cannot be charged. Charge the no-load voltage to 4.2V or higher, otherwise it will damage the battery. This is the special place for lithium batteries.

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