Ability for audible alarm even if power is out.

My power went out last night. I walked through pitch black house to front door and went outside to see if I was the only one. When I opened the front door the Hub chime went off. Then I remebered it has a short battery backup. But then I remebered the alarm was set for HOME. When I walked to the keypad, it lit up and was indicating HOME. The Hub knew the frontdoor was opened, but it only gave a chime when it should have activated an audible alarm. Can we make the Hub activate the alarm even while on battery? I wasn’t aware there was no audible alarm if it was not connected to internet.

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