This article was originally published with the title “ A Convenient Pocket Transit ” in Scientific American Magazine Vol. 97 No. 18 (November 1907), p. 310 doi:10.1038 ...

Tesla accustomed us to using lithium-ion cells in cylindrical form factor, starting with 1865 (18650) in Model S/X, 2170 in Model 3/Y and soon 4680, but there is one exception - prismatic LFP cells.