Lithium-ion nomenclature question

[42]

OK, the first two numbers are the width in mm, the second two the length and the last describing the shape, right? Then what's up with the 15266?!

Also, what other options are available for the last digit?

Mark

 

[LumenHound]

Generally speaking, the last number is usually a 5 or a zero.
Manufacturers can print the actual size on the shrink wrap if the want but if the cell fits into a given plus or minus specification size then that's what you get.

 

[Fallingwater]

The last number should always be zero, as it indicates that the cell is cylindrical (I haven't seen other types of cell indicated by this nomenclature though, so it's not quite clear to me why we aren't just calling them 1865 and 1440 and so on).
Some manufacturers are unaware of this, and think that the last number is a continuation of the length - 65.0 mm. So you get things like the 17335 cell, which is supposedly silghtly thicker and shorter than a 16340. I say "supposedly" because the one 17335 I have is exactly the same size as my 16340s...

I've never seen a cell with 6 as the last number, though. What, they're measuring them to a tenth of a millimetre?

 

[45/70]

There are RCR2 cells that have "15266" printed on them. I think a lot of the problem with regards to some cells being labeled with tenths of a millimeter intead of the number representing the cell's shape, stems from the fact that a lot of the companies that actually put the shrink wrap on Li-Ion cells, aren't manufacturers, but distributors like xxxxxFire, for example. I've never seen a cylindrical cell that was labeled by an actual manufacturer that ended with anything but"0".

Dave

 

[Justin Case]

I don't think that the final digit indicates shape. That's what the "R" (round-cylindrical) is for. Definitely for primary cells, the height is specified in tenths of mm. Thus, a CR2025 coin cell is a Li/MnO2 chemistry, round-cylindrical shape, 20mm diam, and 2.5mm tall.

A CR123A is also known as a CR17345.

Presumably, secondary cells use the same IEC nomenclature for size.

 

[Justin Case]

There are RCR2 cells that have "15266" printed on them. I think a lot of the problem with regards to some cells being labeled with tenths of a millimeter intead of the number representing the cell's shape, stems from the fact that a lot of the companies that actually put the shrink wrap on Li-Ion cells, aren't manufacturers, but distributors like xxxxxFire, for example. I've never seen a cylindrical cell that was labeled by an actual manufacturer that ended with anything but"0".

Dave

The "R" already indicates shape. The numbers indicate a cell of 15mm diam, 26.6mm height.

 

[45/70]

The "R" already indicates shape. The numbers indicate a cell of 15mm diam, 26.6mm height.

Hi Justin. If I remember correctly the "C" means cylindrical, and the "R" represents lithium chemistry. Why the later is an "R" is beyond me, but I'm pretty sure that's correct. Also I'm just as sure that the last of the 5 digit number is the indicator for the cell's shape, "0" meaning round, and not related to the 3rd and 4th digits which represent the cells length.

Busy now, will check up on it later.

Dave

 

[Inkidu]

I have a vague idea but I want to know for sure.

38120s and 38120p

What does the "s" or the "p" stand for.

Standard and power?

Isn't there also an "L"

Thanks for any help.

 

[Justin Case]

Hi Justin. If I remember correctly the "C" means cylindrical, and the "R" represents lithium chemistry. Why the later is an "R" is beyond me, but I'm pretty sure that's correct. Also I'm just as sure that the last of the 5 digit number is the indicator for the cell's shape, "0" meaning round, and not related to the 3rd and 4th digits which represent the cells length.

Busy now, will check up on it later.

Dave

For a primary, the IEC nomenclature for a CR17345

"C" - Li/MnO2 chemistry
"R" - round/cylindrical shape
"17" - 17mm diam
"345" - 34.5mm height

For a secondary, the IEC nomenclature is not RCR123A or whatever. It is ICR16340 or whatever size the vendor wants to pick.

"IC" - carbon negative, LiCoO2 positive, organic electrolyte
"R" - round/cylindrical

 

[45/70]

For a primary, the IEC nomenclature for a CR17345

"C" - Li/MnO2 chemistry
"R" - round/cylindrical shape
"17" - 17mm diam
"345" - 34.5mm height

For a secondary, the IEC nomenclature is not RCR123A or whatever. It is ICR16340 or whatever size the vendor wants to pick.

"IC" - carbon negative, LiCoO2 positive, organic electrolyte
"R" - round/cylindrical

OK, I guess I had it wrong.

Is there a page on the IEC site that pertains to this? I looked around a bit and can't seem to get anywhere, I'm sure it's there but.....

Dave

 

[42]

For a primary, the IEC nomenclature for a CR17345

"C" - Li/MnO2 chemistry
"R" - round/cylindrical shape
"17" - 17mm diam
"345" - 34.5mm height

For a secondary, the IEC nomenclature is not RCR123A or whatever. It is ICR16340 or whatever size the vendor wants to pick.

"IC" - carbon negative, LiCoO2 positive, organic electrolyte
"R" - round/cylindrical

Thanks for clearing that up for me. I was under the impression that the last digit indicated the shape of the cell. IIRC, I read that on Flashlightreviews.com a few years ago.

Mark

 

[45/70]

Thanks for clearing that up for me. I was under the impression that the last digit indicated the shape of the cell. IIRC, I read that on Flashlightreviews.com a few years ago.

Justin is more than likely correct, but a lot of places, including here on CPF, as well as dealers here, mention the last digit as pertaining to cell shape. I looked again on the IEC site, and couldn't find any info. It's there I'm sure, but I find that site particularly hard to navigate.

Dave