Whether the same type of button battery can be used universally

Recently, a BMW owner asked an unexpected question. He wanted to change the key battery. After looking at the original button battery, it was CR2032B. But after searching online for a long time, it was CR2032. Then the question came. Is it universal?

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

We can simply understand the meaning of button battery model, taking CR2032B as an example:

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 pictures of real objects when buying. For example, some of them have welding feet. Although they can be used in theory, we can't install more welding feet.