Are Cr 2045 and Cr 2450 batteries the same?

Oh honey, let me break it down for you. Those batteries might sound similar, but they're as different as night and day. CR2045 and CR2450 have different diameters and thicknesses, so they won't fit in the same devices. It's like trying to squeeze into your high school jeans after Thanksgiving dinner – it's just not gonna work.