Using my cia file with the batch gets me another cia file named "X (Patch)-decrypted.cia", checking the log it says this:
Parsing CIA in file "X.cia":
Parsing NCCH 0
Product code: CTR-U-A2BA
KeyY: 3DEEEB6AA0BCBCA5EA64E21F90B10058
Title ID: 0004000E001B5100
Format version: 2...