What are the common combination parameters of 18650 lithium batteries?

What are the common combination parameters of 18650 lithium batteries?

18650 lithium battery capacity

It is worth noting that many buyers have a misconception that a high capacity will result in a large actual discharge current, but this is exactly the opposite: 18650 lithium batteries are generally divided into capacity type and rate type, with capacity type mainly reflecting large capacity, but the discharge current is generally lower than 1C and the current is relatively small; The rate type can discharge high current, but has a lower capacity and a shorter usage time. This is similar to the trade-off between fish and bear's paw.
Most application fields have different current and time requirements, so most power supply batteries are presented as battery packs. When choosing a battery pack, the consistency, stability, safety of the battery cells should be considered. In addition, each battery in each group of cells should be paired with various values, such as the same voltage, internal resistance, and capacity. These indicators are all very important.

The price of 18650 lithium batteries is directly proportional to their capacity. The larger the capacity, the higher the energy ratio, and the more raw materials are used, so the price will be higher. Generally, the price is 10-30 yuan per unit.

18650 common lithium battery combination parameters
18 is the diameter of 18mm, 65 is the height of 65mm, and 0 represents a cylindrical battery.
The nominal voltage for a single section is generally 3.6V or 3.7V. The charging voltage is generally 4.2V (4.2V-4.3V for lithium cobalt oxide)
The minimum discharge termination voltage is generally 2.75V, below which the battery capacity may significantly decrease or even be scrapped. Maximum charging termination voltage: 4.20V

Diameter: 180.2mm. Height: 652.0mm. Capacity: above 1000mAh, with a regular capacity of 2200mAh to 3200mAh.

The advantages of 18650 lithium batteries
1. Large capacity. The capacity of 18650 lithium batteries is generally between 1200mAh and 3600mAh, while the capacity of general batteries is only about 800mAh. If combined into an 18650 lithium battery pack, it can easily exceed 5000mAh.
2. Long lifespan.
3. High voltage. The voltage of 18650 lithium batteries is generally at 3.6V, 3.8V, and 4.2V, much higher than the 1.2V voltage of nickel cadmium and nickel hydrogen batteries.
4. There is no memory effect. There is no need to empty the remaining battery before charging, which is convenient to use.
5. Low internal resistance.