The definition of 18650 internal resistance is normal.

18650 was the originator of lithium ion batteries-a standard lithium-ion battery model set by SONY in Japan to save costs that year, of which 18 represents 18mm in diameter and 65 represents 65mm. 0 means cylindrical battery. Common 18650 batteries are divided into lithium ion batteries and lithium iron phosphate batteries. The voltage of the lithium-ion battery is a nominal voltage of 3.7V, the charging cuttering voltage is 4.2V, the nominal voltage of the lithium iron phosphate battery is 3.2V, the charging intercept voltage is 3.6V, and the capacity is usually 1200mAh-1800mAh-3200mAh. The capacity of second-tier manufacturers can exceed 3500 capacity. Basically, it is comparable to imported brands such as Samsung 35E, Panasonic GA6, and so on. The common capacity is 2000mAh-2600mAh. Now domestic technology is also very mature and automated. 5C/10C high -power discharge performance. Can be more popular to electronic products that need large current discharge.

Guangzhou Battsys Co., Ltd (NEEQ:837375), was founded in 2006, which is a join-stock high-tech enterprise engaging in ODM and OEM , specially for customized and diverse research&production of lithium-ion battery，BATTSYS annual production capacity is tens of millions battery cells. The products are exported to dozens of countries & regions such as Europe, America & Asia etc.