The last two digits pertains to the thickness of the battery while the first two (or first for batteries that only have three digits) pertain to the diameter. The numbers stamped in the battery are not random they are actually a description of the physical dimensions of the battery. Given the example above, a DL2032 battery can be used to replace a CR2032 battery and vice versa. Actually, the DL and CR batteries are interchangeable as long as the numbers that follow are the same. What this change actually does is raise some confusion as consumers would typically look for an exact match to the battery that they have. Not really very easy when the batteries at this category are used in low power devices and would typically last for months if not years. Duracell may want to differentiate their product because it has a higher capacity and they want that reputation to spread. The probable rationale behind changing from the generic designation to a unique one is to differentiate their product from what is commonly available. On the other hand, the DL designation is used by the battery maker Duracell. CR is basically a generic designation just like AA and AAA. The main difference between CR and DL batteries is just the maker. This is the case when it comes to CR batteries like the CR2032 and DL2032. When it comes to unusual batteries like the coin type batteries, it is a bit more important to get the exact type that you are looking for to ensure that it is the correct fit and voltage and avoid having to buy the battery again.
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