Here is a new article from WSJ that talks about gigafactory and has dimension details of the new and old batteries Tesla Races to Finish ‘Gigafactory’ in Time for Model 3 Rollout When you read about the details of the battery you will encounter the following paragraph "Tesla’s gigafactory will be the first ever to make a new format of battery—a 21/70, rather than the 18/650 that the auto maker uses today for the Model S and Model X. The latter cylinder-shaped battery is commonly used in portable electronics and has been used by Tesla since the beginning. The numbers stand for the width and length in millimeters." The dimensions of the old battery 18/650 dont make sense, because 650mm is a couple of feet long which is in no way will fit model s or x floor. I thought it is a typo first but the author uses exactly the same numbers in the comments section. Do you know what is the actual size of the "old" cell?