what are 18650 batteries

18650 batteries are lithium-ion rechargeable batteries that are commonly used in a wide range of electronic devices. Named for their 18mm diameter and 65mm length, 18650 batteries are known for their high energy density and long-lasting power. These batteries are popular in applications such as laptops, flashlights, power tools, electronic cigarettes, and a variety of other portable electronic devices. Due to their high capacity and ability to deliver consistent power, 18650 batteries have become a popular choice for many consumers. They are also known for their durability and reliable performance, making them a preferred option for professionals and hobbyists alike. With the increasing demand for portable electronic devices, 18650 batteries continue to be at the forefront of battery technology, providing a reliable and efficient power source for a wide range of applications.