CR battery shape anomaly

Ah, he's just sent me this link.

Maybe the "N" stands for "Not really the same shape as all the others"

Gareth.

The battery on the right looks exactly like the one in my signal generator, a Rohde and Schwarz SMT03. I could open it up later today and get you a part # if that would be of any use. Let me know.

The solution to this problem is to buy a "correct" holder and replace the original.

----------------- What's odd is that the "original" cell has the wrong shape. Had the change been in the other direction, I wouldn't have been surprised. The Chinese are very bad about sticking with the correct dimensions. I bought supposedly correct 3V alkaline batteries for a folding Colorpack camera -- and they wouldn?t fit. The seller told me his suppliers don't care to get it right. (I would up having to use CR123A cells.)

Well not really, he could get this:

instead of this:

The question is, why do both these types currently exist side by side, being as they (according to my customer) are non compatible in certain holders?

(I have just pulled both those pdf's straight from the Farnell website)

Gareth.

There's two mechanical variants, both with the 2450 part number. CR2450 and CR2450N don't fit the same socket. Some industrial suppliers ( Mcmaster.com for instance) offer both, but usual stocks of batteries (at shops) offer only one manufacturer's offerings and would only have ONE of the two.

CR2450 :== McMaster # 7701K58, CR2450N :== McMaster #7702K62 The CR2450N is appropriate for (among other things) my digital micrometer; as far as I know, it's a Renata product only.

There's two mechanical variants, both with the 2450 part number. CR2450 and CR2450N don't fit the same socket. Some industrial suppliers ( Mcmaster.com for instance) offer both, but usual stocks of batteries (at shops) offer only one manufacturer's offerings and would only have ONE of the two.

CR2450 :== McMaster # 7701K58, CR2450N :== McMaster #7701K62 The CR2450N is appropriate for (among other things) my digital micrometer; as far as I know, it's a Renata product only.

Thanks.

Pretty much the only CR series of battery I ever come across is the CR2032 in its various connection guises. There don't appear to be any such mechanical variants with that type. Or at least Renata don't make one.

Cheers,

Gareth.

The cell holder could possibly be modified with a Dremel tool or similar to accept the more common cell.. or buy a holder for a common cell and maybe solder it in place of the existing holder or possibly mount it off to the side somewhere nearby.

-- Cheers, WB .............