How can I know the actual capacity of 18650 lithium batteries? The labeled capacity of unscrupulous manufacturers cannot be trusted. If you want to know the actual capacity, you need to use professional testing equipment for charging and discharging tests. Therefore, most people do not know the specific capacity size when they get it, and it is easy to be deceived by sellers. If buyers do feel that the capacity is suspicious, they can request the supplier to provide a testing report or choose a third-party professional testing agency to provide a report.
Due to the fixed size of 18650 lithium batteries, their maximum capacity has always been a concern for many practitioners. In recent years, various manufacturers have improved their technology and correspondingly increased their capacity. Samsung, Panasonic, LG, Sony, and Toshiba can all achieve a capacity of 3600mAh or more, but the most stable and consistent capacity range is still between 2600-3000mAh. If you are making a battery pack, it is best not to use the highest capacity. Both cost-effectiveness and the service life of the battery pack after grouping are not very cost-effective. Therefore, it does not mean that the higher the cell capacity, the more stable and long-lasting the use.
The battery pack needs to be customized according to the product. If the product belongs to the mid to high end, the battery can choose imported batteries from big brands (original), because many small battery manufacturers in China have false labels. If the price is too sensitive (such as intense price competition for strong light flashlight products), then you can choose domestic regular manufacturers with 2200mAh~2600mAh battery cells or lower 1500+capacity. 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, and safety of the battery cells should be considered, which are all very important indicators.
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.
Finally, 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.
