Rechargeable battery name

[JohnD]

I have some solar lamps where the battery is cylindrical, and IIRC it has a name or type number derived from its size. I have an idea it is something like 600200

if the length is 60mm and the diameter 20mm

But that doesn't seem to be right

Anyone know what I mean?

 

[jj4091]

Do you mean this type of thing. https://www.google.com/search?client=safari&rls=en&q=battery+for+solar+lamp&ie=UTF-8&oe=UTF-8#ip=1 I would think perhaps the 600 on yours refers to 600mAh

 

[JohnD]

Ah, it looks like the 18650

I think diameter 18mm, length 65mm might be the derivation.

I'd misremembered the numbers. The one I looked at was not marked.

Thanks