Hi,
Ali might be mentioning "Vendor Batch" functionality, explained more in this blog post of Tim Schofield: Vendor batch registration in AX 2012
Basicly, application gives users the functionality to have vendor batch numbers besides legal entity's own batch numbers. In such a case, Item X might have a batch number of B110 and an external batch number as well.
Ali, as I know, you can have one vendor batch number for each batch you have in 365/AX. It is a one-to-one relation.