You misunderstood, 18650 is not a brand! ! Why is it called “18650” battery? In fact, the 18650 battery was originally a standard battery model defined by the Japanese company SONY. The numbers actually represent the appearance specifications of the battery, where "18" means the diameter is 18mm, "65" means the height is 65mm, and "0". " means it is a cylindrical battery; the CMICR on the front is not a trademark;
The trademark issue you are most concerned about does not exist, many batteries of this type are sold by TB JD!
1865 batteries originally referred to nickel-metal hydride batteries and lithium-ion batteries being less commonly used. today it is now mainly lithium-ion batteries 1865 is the origin of lithium-ion batteries A standard lithium-ion battery model.defined by the Japanese company Sony Corporation in order to reduce costs, including 18 indicating a diameter of 18 m², 65 indicating a length of 65 m² and 0 indicating a diameter of 18 m². a cylindrical battery. Ternary lithium-ion batteries and lithium iron phosphate batteries are commonly used. It has high safety performance, high energy density, low cost and high performance/price ratio.
21700 battery cylindrical battery model, especially the outer diameter of the 21 cylindrical battery is 21mm and the height of the 700 cylindrical battery is 70mm.
This is a new model developed to adapt to the requirements of electric vehicles for long range and to improve the use of vehicle battery space. Compared with 18650 batteries, its capacity can be 35% higher. Energy density is increased by 20 points and cost is reduced by 9 panointed. The weight has dropped by 10 points.
So the capacity of 21700 battery is higher than that of 18650 battery, and all major manufacturers are deploying 21700 batteries. For example, the first 21700 factory in China is Lishen Battery, with a volume monthly shipment of 10 million units. Others include BAK batteries, etc.