Question moved from Cars and Trucks to Electronic Locks.
Yes you can if you have the System 6000. From the manual.
https://www.dormakaba.com/resource/blob/1073080/98f7febd813735b4c42223cdfc771c76/system-6000-reference-manual-pdf-data.pdf
Emergency Lock Power Supply (ELPS) The Emergency Lock.
Power Supply is used to restore battery power to a lock that has insufficient internal battery power. When inserted into the lock, and inserting a cut valid keycard, a lock with a dead battery can be activated. This capability eliminates the need to forcibly remove a lock from a door because it has lost power. Once the door has been opened, the batteries can be replaced.
Lock Programmer and Interrogator (LPI) Interface Probe / ELPS power override
The Lock Programmer and Interrogator Interface Probe serves as an interface between the LPI Device and the lock. The probe can be used to program locks or to interrogate a lock when it is necessary to obtain a history of the keycards that were used to access the lock. The smartcard probe also allows an emergency override option when a dead battery condition occurs on a lock. Once the door has been opened, the batteries can be replaced.
Video and further help
https://www.google.com/search?q=Saflok+HH6%2C+door+with+dead+battery
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