There seems to be a problem with the ADP-NT24V power adapter.
I connect the adapter with a 24V power supply and a 3V battery then i get a slowly raising battery voltage for the A5, it reaches the 3V after approx. half an hour.
When I disconnect the 24V it rapidly falls to around 0.5-0.6V, which resets the clock, since at least 2.5V battery voltage is needed.
What battery do I need for the ADP-NT24V? I already tried 12V which didn't change much.