Leica C2 (compact) battery

The battery in my Leica C2 compact have finally died.
Strange enough Ican't find no battery to replace!
I have found the C1 manual in Buktus, but can assure you they don't work the same!

So anyone that has one and know how and where to replace the battery or has a link to a manual outlining the process?

Sorry, was going to post in error.