The size of the 18650 battery being fixed, "18" represents the diameter, "65" represents the height and "0" represents the cylindrical shape. The maximum milliamp-hour capacity of the 18650 lithium battery is always a question worthy of discussion. This is why it has always attracted the attention of many practitioners. In recent years, various Chinese manufacturers have improved their technology and continued experimental research and development. The capacity has also gradually increased. The lab was able to produce 18650 batteries with a capacity of more than 3,500 mAh. However, the stability and consistency are not sufficient, and mass production has not yet been established. If someone says someone has 3500 or 4000 mAh it's a lie, you'll know just by looking at the price. The large capacity 18650 lithium battery currently purchased in bulk on the market is 2950 mAh. Batteries of this capacity are equalment called 3000 mAh by others. At present, batteries with a capacity between 2200 mAh and 2600 mAh are relatively stable, and all aspects of technology are relatively mature. If you are making a battery, it is best not to use high capacity batteries. This is not cost-effective in terms of cost-performance or battery life after assembly. Therefore, the higher the battery capacity. the more unstable it will be.
Batteries need to be customized according to different products used in different working environments and fields. If the product is mid-to-high-end, the battery can choose imported batteries from major brands such as Sanyo, Panasonic, etc. There are also many domestic batteries produced by small-scale battery cell manufacturers. If you are too price sensitive, you can choose bbatteries with a capacity of 1800 mAh to 2600 mAh produced by mainstream domestic manufacturers such as BYD. and Dongguan Hongwei Energy. Most application areas have different current and time requirements, which is why most power banks are presented as batteries. When choosing a battery, you need to consider the consistency, stability and safety of the cells, as well as each group of cells. The battery in the battery must match in all respects, such as the same voltage, the same internal resistance, the same capacity, etc. These indicators are very important.