Scan and Ship requires you to scan in the order items prior to printing shipping labels. However, some items, like batteries are really interchangeable; it doesn't really matter if it's Duracell or Energizer.You can configure replacement SKUs for such items and allow Scan and Ship to recognize the replacement SKU.
Kits can have replacements that have a different quantity configuration. For example, a kit comprised of 12 packs of 50 = 600. It can be replaced by a kit of 30 packs of 20 = 600. Although the order will have a quantity of 12, you will still be able to add 30 packs of 20 as replacements. This works by enabling a setting in ShipBridge - Menu > Options > Scan and Ship > Look for Replacement Kit Items.
To see the replacements products of any SKU, or multiple SKUs, select the product(s) on the Manage Inventory page and use the action Export Replacement SKUs. An export file will be generated that lists the SKUs and their replacements.