I am installing with my kid a simple reader connected to a controller with a mag lock on his bedroom door.
The controller is inside a metal box with a battery on the bottom. So if there is no more power in the house, the reader/controller are still working (for a few hours?).
However, the mag lock is power supplied externally without any battery back up. What happen when there is a power outage? The door will be unlocked?
I don't see any input on the controller to power the mag lock.
Should I add a power supply with battery backup? This seems to cost more than a 100$. (Compared to the controller that just cost me 70$ )
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