I am not sure I have ever owned more than one desktop alarm clock, but I have used a few, and in my experience by the time a real power failure occurs the 9v ba

I am not sure I have ever owned more than one desktop alarm clock, but I have used a few, and in my experience by the time a real power failure occurs the 9v backup batteries have drained to the point that it resets anyway. I have also lived in a country where blackouts quite rare, usually just local blackouts due to a tree hitting a powerline, so in any given year I wouldn't expect one.