As stated:
The battery is purchased through your local Doosan Dealer
Get the DVSD, DVSC, etc...model of drive, or at least the machine's serial number and call their parts department.
They'll get you the correct part.
Do you need the number for your local dealer?
...or are you just looking to purchase it elsewhere to try to save money... (that is fine, I just don't want to keep bothering you if that is your wish)