*Batch Entry is not the same thing as batch upload. See Consignor Access Batch Upload.
The Batch entry also includes a way to batch upload however.
Batch Entry allows the consignor to add the same item to multiple store locations with the same SKU.
Click 'Add Item' in the top right
Fill in the details for the item, click Create (at the bottom right)
The item will be created. Click the arrow to expand the item, you'll see the option to increase the quantity at other store locations, set the price, set do not discount.
You'll also see Copy and Delete - these allow you to create another instance of the item you have created if you are adding similar inventory (Copy) or remove the item and start again (Delete).
Fill in the information, scroll to the top and hit Complete Batch. The inventory will be created at each store location.