Rename file, but 4 letters in -

Rename file, but 4 letters in -

i have code:

%a% represents folders name e.g. "test123"

for %%a in (*) rename "%%a" "%%a-%a%"

the function above renames files in folder appending file name folders name e.g.

fromwater.avi towater.avi-test123

this issue want ".avi" @ end.

is there way rename rename 4 letters in.

like this, using modifiers :

for %%a in (*) rename "%%a" "%%~na-%a%%%~xa"

batch-file