Managing Batch wise Inventory

To maintain batches against an Item you need to mention 'has batch no' as yes in the Item Master. You can create a new Batch from

Stock > Documents > Batch > New

To learn more about batch check out the manual page at https://manual.erpnext.com/contents/stock/batch

While making a purchase receipt or delivery note, mention the batch number against the item.

Batch No. in Purchase Receipt

Batch No. in Delivery Note

Batch-wise Stock Balance Report

To check batch-wise stock balance report, go to:

Stock > Standard Reports > Batch-wise Balance History