Explanation on the application of button battery CR2032

Recently, a BMW owner asked a question, that is, he wanted to replace the key battery. He looked at the original button battery and found that it was cr2032b, but many of them were CR2032 online. Can they be generic?

First of all, make the point that it can be universal.

Taking cr2032b as an example, we can simply understand the meaning of button battery model:

C: The initial letter C represents the battery material, which uses lithium manganese, manganese dioxide as the positive electrode, and lithium metal as the negative electrode.

R: R represents that the shape of the button battery is cylindrical.

20: It represents that the diameter of button battery is 20, in mm.

32: This represents the thickness of button battery 3.2, also in mm,

B: This does not have a particularly important meaning. Different manufacturers may have different representations, such as the product number and the battery with solder legs.

So, let's look at the first six. Of course, we can compare the real pictures when we buy. For example, whether it has weld legs or not, although it can be used in theory, we cannot install more weld legs.