18650 Battery Cells

An 18650 battery is a popular type of rechargeable lithium-ion cell named for its dimensions: 18mm in diameter and 65mm in length. Known for their versatility and reliability, 18650 batteries have been widely used in a range of devices, including laptops, flashlights, e-bikes, and portable power tools. They are valued for their balance of capacity, energy density, and long cycle life. While newer battery types like 21700 are gaining traction, 18650 cells remain a standard choice for many applications due to their proven performance and compatibility with existing devices. Their compact size and dependable power output make them a trusted option for both consumer electronics and DIY projects.