The following is not meant sarcastically or personally.

In trying to adapt CR123A lithium cells to a Polaroid 360 designed for PX-24
alkaline batteries, I had to insert several brass washers to make up the
difference in length. Differences of a fraction of a millimeter don't seem
important.

My experience with Chinese batteries is that the manufacturers don't care
about the exact dimensions. The batteries are sometimes too fat to fit.