EB-BW627ABA is the part number for the 2 battery assembly.
It is not the part number of the individual batteries,
The battery assembly EB-BW627ABA (also listed as EB-BW627ABE) for the Samsung Galaxy Book 10.6“ (models SM-W620 / SM-W627) is a 7.6 V, 4000 mAh (30.4 Wh) Li-ion/Li-polymer pack.
Samsung service/part numbers associated with it are primarily GH43-04711A and GH43-04720A.