You can manage your stock batches including different option like Model No, Size, Mfg. Date, Exp. Date. To enable this options follow the steps below
Step 1 : Go to the "Settings" options on your dashboard.
Step 2 : Click on "Product & Stock" Submenu from the list.
Step 3 : Under the Batch Settings section, you will see have Toggle button for fields like (Ex. Model No, Size) and date fields (Ex. Mfg. Date, Exp. Date). Turn On (Enable) the ones you need for your business. You can also rename these fields as per your requirements.
Note: Now, when you add a new product with batch-wise stock, you will see the enabled fields available to help you manage the batch.