In OnCloudERP, 

        Batch Number is a unique identifying number assigned to one product batch which can be used to identify each individual finished product made in that batch.

        With Batch Number you can check the entire manufacturing history of that product.

You can Enable Batch number in Settings----->Inventory Settings

Batch Code and Item name are mandatory fields.  

You can add multiple items under item details and assign a Batch Number to it.

OnCloudERP let you enable Number Series to the Batch number you are creating using toggle ON/OFF option.

Also Manual toggle ON/OFF option can be used if you like to manually update the Batch number when the item/stock is sold or during item inward.