18650 Battery Types:
(1) Lithium batteries can be divided into square lithium batteries (such as commonly used mobile phone batteries) and cylindrical batteries (such as 18650) according to their appearance;
(2) Lithium battery outsourcing materials are divided into aluminum shell lithium batteries, steel shell lithium batteries, and soft pack batteries;
(3) Lithium batteries are divided into positive and negative electrode materials (additives): LiCoO2 batteries or LiMn2O4 batteries, lithium iron phosphate batteries, and disposable lithium manganese dioxide batteries; In addition to these three, there are also lithium-ion LIB and polymer PLB;
(4) In terms of different performance applications:
Disposable lithium manganese batteries and button type 3-volt batteries with high capacity (high platform) - used in mobile digital products; High magnification - used on electric vehicles, power tools, and airplane models; High temperature - mining lamp, indoor lighting fixture, machine built-in backup power supply; Low temperature outdoor environment, North (winter) Antarctica. This is the detailed classification of 18650 lithium batteries faced by all parties.
18650 battery voltage and capacity specifications:
18650 lithium battery specifications (2 sheets) Next, let's understand the voltage and capacity specifications of 18650 lithium batteries, mainly including nickel hydrogen battery voltage and lithium-ion battery voltage: nickel hydrogen battery voltage is 1.2V, common capacity is 2500MAH; Lithium ion batteries have a voltage of 3.6V and a common capacity of 1500MAH-3100MAH. What are the types and differences of 18650 lithium batteries? The standard for lithium batteries is 3.7V or 4.2V, which is one thing. It's just that the manufacturer's labeling is different. 3.7V refers to the platform voltage (i.e. average voltage) at which the battery is discharged during use, while 4.2V refers to the voltage when fully charged.
18650 battery usage:
The theoretical lifespan of 18650 lithium batteries is one thousand cycles of charging. Commonly used in strong light flashlights, headlights, mobile medical equipment, and other fields. It can also be combined, and there is a difference between with and without a board. The main difference is the protection of over discharge with a board, which prevents charging from becoming outdated or the battery from being scrapped due to too clean electricity. The mobile phone charger should be launched this month, which is the kind that can be charged anytime and anywhere, and should be able to meet the charging needs of general customers. And this mobile phone charger is versatile! There is a mobile interface! 18650 is now widely used in laptop batteries, as well as some high-intensity flashlights. Of course, 18650 has excellent performance, so as long as the capacity and voltage are suitable, it is much better than batteries made of other materials. Mobile devices, digital devices, walkie talkies, power tools. Any electrical appliance with a voltage between 3.5-5V can be used.
The difference between 18650 batteries:
How to distinguish 18650 lithium batteries? The first point has a diameter of 18 millimeters and a length of 65 millimeters; The model of battery No. 5 is 14500, with a diameter of 14 millimeters and a length of 50 millimeters; Generally, 18650 batteries are more commonly used in industry and less commonly used in civilian applications. They are commonly used in laptop batteries and high-end flashlights. So, 18650 is just the size and model of the battery. According to the type of battery, it can also be divided into 18650 for lithium-ion, 18650 for lithium iron phosphate, and 18650 for nickel hydrogen (rarely seen). Currently, most common 18650 batteries are lithium-ion batteries.
Precautions
The common rechargeable 18650 lithium batteries have a voltage of 3.6 or 3.7V, and when fully charged, it is 4.2V, which is not related to the battery capacity. The mainstream capacity of 18650 batteries ranges from 1800mAh to 2600mAh (18650 power batteries have a capacity mostly between 1200-1600mAh), and mainstream capacities even have a standard of 3500 or 4000mAh or above (reminding everyone that 18650 batteries with a capacity of 3100mAh or above are not trustworthy and have serious false labeling. There are no 18650 batteries with such large capacity in the world).
It is generally believed that setting the no-load voltage of a lithium battery to 3.7V means that the battery is fully charged, but this is not accepted; Lithium batteries should not be discharged with an unloaded voltage below 3.7V, as excessive discharge can damage the battery; 4.2V is the maximum limit voltage for battery charging. Do not assume that charging a lithium battery to 4.2V at no load voltage means it is fully charged; During the battery charging process, the voltage of the battery gradually increases from 3.7V to 4.2V. Lithium batteries cannot be charged with an unloaded voltage above 4.2V, otherwise it will also damage the battery. This is the special feature of lithium batteries.
