Decrypting battery designations

[VaporMadness]

Not sure if this is the base category to post this info in, but... I recently stubled across this info elsewhere...

The designation "16340" has only to do with cell size, and does not define anything about the chemistry of the cell.

CR123 is one of many designations specific to a lithium manganese dioxide primary cell that happens to be 16340 in size.

16mm x 34mm x "0"
the "0" designates that it is a cylindrical shape.

A cell sold as a "16340" should never be considered a direct replacement for a CR123. Some devices will be compatible and others will not, depends on the specific type of 16340 and the device they are to be used in.

I thought this may be of interest here as the battery numbers are quite bewildering, but apparently there is a method to the madness

10440 = 10mm x 44mm (volume = 13825 mm³)
16340 = 16mm x 34mm (volume = 27348 mm³)
14500 = 14mm x 50mm (volume = 30792 mm³)
18650 = 18mm x 65mm (volume = 66171 mm³)

I expect volume is a good indication of relative capacity.

 

[VaporMadness]

Doh! I just came back to refer to these volume calculations in comparison to additional sizes... and noticed that I had completely screwed up the calculations... pi x radius² x height... i had used diameter² in the original post

10440 = 10mm x 44mm (volume = 3456 mm[SUP]3[/SUP])
CR2   = 15mm x 27mm (volume = 4771 mm[SUP]3[/SUP])
16340 = 16mm x 34mm (volume = 6836 mm[SUP]3[/SUP]) | CR123a
14500 = 14mm x 50mm (volume = 7697 mm[SUP]3[/SUP])
18350 = 18mm x 35mm (volume = 8906 mm[SUP]3[/SUP])
14650 = 14mm x 65mm (volume = 10006 mm[SUP]3[/SUP])
18650 = 18mm x 65mm (volume = 16540 mm[SUP]3[/SUP])