Not tried the battery operated ones. My experience in Business were the heat/motion high - tech dealies.
There is a reason why Women decorate the window sill. Oh sure it looks nice...stuff makes a lot of noise when if falls of and breaks.
Ever notice Women always have a simple chair in the bedroom ? It happens to fit under the door knob of bedroom door.
Funny how that quilting rack is postioned where it is....
Simple - if you take a potted plant for instance , and the string around the terra cotta pot is tied to the window lock - window up / plant comes down - crash !
Take a drill and drill two holes , one either side where window cannot be raised more than 3 " . Insert nails to allow ventalation. Drill 2 more with window closed, insert nails . They have to break it , because they ain't gonna open it.
I do this on sliding patio doors as well .
The Glass bottle with marbles works on door knobs real well.
Kinda fun to "read a room" some folks can , and some folks miss stuff. Is it decoration or not?
I used to have a collection of beer cans and bottles ...when it fell over it would wake the dead.
In business and such there is a place for backup power and battery backup for alarms and such . Well besides the Insurance Company demanding it.
I have never felt comfortable being totally reliant on any one system. Not real keen on many back up systems. I've seen too much ...One reason I won't use a safe with a battery dial, or a small gun vault with battery.
Physical stuff , mechanical stuff like glass, marbles,chairs, potted plants, vases, and nails works.
Hey - I wonder why that oil lamp is sitting on 2 books by Kipling on the edge of my window sill? Okay - which one of youfolks put the copper bell on the blinds? If the blind moves the bell rings? Gee - somebody done drilled 4 holes ( 2 each side ) of my my widow sill - and stuck nails in them !!
Hey - I'm a guy , your supposed to leave the wooden ladder in the front room , so its about "door knob" high....its guy thing. We don't know nothing about 'decorating' ...thats what gals do - men are heathens.