Below is the most comprehensive lithium ion cell sizes chart, comparing key specifications for popular models like 18650 and 21700 batteries. Common Sizes and Dimensions Understanding key differences between popular cell sizes:Lithium battery sizes refer to the standardized physical measurements of rechargeable cells, usually coded as five-digit numbers like 18650 or 21700. In these codes, the first two digits show the diameter in millimeters, while the next three represent the height in tenths of a millimeter. Our goal is for you to become familiar with the current Lithium Batteries & Cells Shipping Guide by following these simple instructions and for you to use it as an ongoing source for the. The 200ah batteries available online look like they might be to wide for the factory standard battery box, but perhaps 2 100ah batteries might fit? If anyone has experience with this or has the measurements of the factory provided box, it would be appreciated. thanks! Our dealer has told us our new. This guide provides practical lithium battery packaging advice that meets IATA, UPS, FedEx, and major shipping carriers' requirements. Lithium batteries are not fragile in the traditional sense—but they are reactive.