Sonic Cat Repellers

[calda49]

Do these actually work overnight and when it is dull? Am I better off buying a battery operated one? Any suggestions welcome, thanks.

[calda49]

Sorry I forgot to say this question is referring to a solar powered cat repeller as opposed to a battery operated one.

[Old_Geezer]

I think they all go wrong too soon. And as the cat hears whatever and not the human it's a often difficult to know if they're working at all.

I have 3 cat deterrents in my back garden, two are solar, one is mains (via power supply of course). The mains one has quickly gone to the stage of putting out a human audible tone every time I walk near so I conclude it's broken within months. The other two, I have little idea if they work. I don't get as much problem as I used to but that hasn't stopped some cat crapping next to one of them a few times.