BADI to work in background job too

Hi

I am using a BADI to manipulate price of a purchase req. I have put condition as sy-tocde as ME51N,52N,53N for the logic written.

But now they want the BADI to do its work when creating the PR in background too...

Is the check sy-batch EQ 'X' enough along with sy-tcode check ?

Pls suggest