21700 rechargeable Li-Ion battery cells

21700 Li-ion battery cells are a popular and relatively new standard for rechargeable lithium-ion batteries. Named after their dimensions (21mm in diameter and 70mm in length), these cells offer a larger capacity and higher energy density compared to the older 18650 format. This makes them well-suited for high-performance applications, such as electric vehicles and energy storage systems. 21700 cells are known for their efficiency, durability, and ability to provide extended power in compact devices and emerging technologies.