I know this is an old thread, but found it when looking how to convert cbr to cbz so I can read comics on my mobile phone. So firstly thanks. Secondly, to do the batch extension renaming I use Irfanview a freeware image converter.
To do this open Irfanview
- Press 'B' as this is the keyboard shortcut to the Batch conversion window
- ensure Batch rename is selected
- In the Name pattern box under Batch rename settings, put $N.rar
( $N is the filename without extension, so you are simply making your .cbr to .rar)
- click Options (this only has to be done once as the app remembers settings after closing) and ensure "rename original/input files" and "overwrite existing files" have been selected
- in the directory view add all the files you want to rename
- click start batch
Once you've used the convert archive step in the first post, to then change the .zip to .cbr, you simply repeat the above steps but in the Name pattern box put $N.cbz
Cheers
