will it work in the Leica cl ?
I'm not sure - I don't have any experience with Leicas.
The only reason i bought this one was based on the battery in the camera (I think) and I cross-referenced the code on that battery against modern equivalents.
I may have gotten the battery number from an old user manual i found online.
At any rate, the battery works in the camera I purchased it for; there's a chance it will work in the Leica.