Battery Replaycement DELL M6400 (and others)

the onboard battery CR 2023 of my dell precision m6400 was empty. When i wanted to change it I realized, that the contact were welded. Buy a new one? No.

carefully detach contacts, print this, Place the contacts through the openings on the battery (observe polarity!) and carefully push them into the housing. Pull lightly on the wires.