Why do AD Series offline locks still give a Low Coin Cell indication after I install a new coin cell?

Coin cell replacement is not immediately registered by the AD200/250 firmware.
Performing a processor reset (pressing and releasing S1 on the Main PCB Assembly) will register the new coin cell.
Cycling lock power (i.e., disconnecting and reconnecting the "AA" battery pack) will register the new coin cell.
The coin cell part number is CR2025 - 3 volt lithium - available at most battery or electronics stores.

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