Allocating Serial or Batch Items from Bin Locations in Pick and Pack 
SAP Business One lets you allocate items from bin locations throughout the entire pick and pack process.
To allocate items that are managed by serials or batches from bin locations in pick and pack, proceed as follows:
Prerequisites
You have enabled bin locations for at least one warehouse in your company.
For more information, see Enabling Bin Locations.
The items you commit in the sales order and A/R reserve invoice document rows are stored in warehouses with bin locations.
The items you commit in the sales order and A/R reserve invoice document rows are managed by serials or batches.
Procedure
From the SAP Business One Main Menu, choose
Inventory 
Pick and Pack Pick and Pack Manager 
.In the Pick and Pack Manager - Selection Criteria window, specify the selection criteria and choose OK.
In the Pick and Pack Manager - Open Drawer, select the sales order and A/R reserve invoice rows for which you want to create pick lists, and proceed as follows:
For serial and batch items that are issued primarily by bin locations, enter the quantity you want to release to the pick lists.
NoteIn pick and pack, SAP Business One treats this kind of serial and batch item as regular items that are not managed by serials or batches. You cannot select the serials or batches here as you have not selected the bin locations yet. The system lets you select the serials and batches only when you create deliveries for the sales order and A/R reserve invoice rows.
End of the note.For serial and batch items that are issued primarily by serial or batch numbers, enter the quantity you want to release to the pick lists and select the serials or batches in either of the following windows:
Serial Number Selection
In this window, you can see the bin location information. When you select a serial number, the corresponding bin location is selected automatically.
Batch Number Selection
In this window, you cannot see the bin location information. You can select the batches here, and perform the bin location allocation later in the pick list generation wizard.
For more information about how to open the two above-mentioned window, see Serial Number Selection Window and Batch Number Selection Window.
In the Pick and Pack Manager - Open Drawer, choose the Release to Pick List pushbutton.
The Pick List Generation Wizard opens.
In step 1 of the wizard, select a range of bin locations from which you want to allocate the items by specifying the warehouse sublevels and bin location attributes.
In step 2 of the wizard, select the method by which the items in the pick lists are automatically allocated from bin locations.
In step 3 of the wizard, specify the general information about the pick lists, and choose the Generate pushbutton.
The pick lists are generated with the items allocated from bin locations according to the range and method you specified in step 4 and 5, respectively.
To manually change the bin location allocation, open one of the following windows from thePick and Pack Manager - Released Drawer:
Bin Location Allocation - Issue
This window is for serial and batch items that are issued primarily by bin locations.
Serial Number Selection
This window is for serial items that are issued primarily by serial numbers.
Batch Number Selection
This window is for batch items that are issued primarily by batch numbers.
To manually change the bin location allocation again while picking the items for delivery, open the three windows as mentioned in step 8 from the Pick List window.