Hi!
Yes. It is need. It is easy with vag-com.
Procedure:
[Select] [61 - Battery Regulation] [Coding - 07] Use the pull down menu to select the battery (slave) listed as #1.
[Battery Coding] Enter the new Battery Part Number (10 or 11 digits).
Enter the new Battery Serial Number (10 digits).
Select the new Battery Vendor. [OK] [Do it!]
[Close Controller, Go Back - 06] .
If your new battery isn't original, it doesn't have code but you can enter other code of old battery or code partner's batery.
What specifications does your batery have?
I can find a code for you.