TIL coin / button battery numbers reflect their physical size. For example the popular CR2032 battery you may have heard of means its 20MM in diameter and 3.2MM in height. The CR2477 is a 24MM diameter 7.7MM in height battery. by whatilearned May 4, 2022, 7:42 pm Read more: https://en.wikipedia.org/wiki/Button_cell What do you think? 12 Points Upvote Downvote 20mm24MM32MM77MMbatterybuttoncoinCR2032CR2477diameterheardheightmeansNumbersphysicalpopularreflectsizeTILToday I learned See more Previous article Jamestown: America’s first English settlement now endangered Next article Martin Cabello 3 Comments Leave a Reply Very cool to know. Thanks. Log in to Reply Often a 2-letter code (sometimes on the side of the battery) where the first letter identifies the manufacturer and the second is the year of manufacture. For example: YN – the letter N is the 14th letter in the alphabet and indicates the cell was manufactured in 2014. Log in to Reply That kind of metrical organization wouldn’t fly in Murrica. Log in to Reply Leave a Reply Cancel replyYou must be logged in to post a comment.