I'm. . . reluctantly impressed by the engineering, though.

[squirelawrence]

Came home to find my downstairs neighbors' smoke alarms going off.  Again.  They're not home.  Again.  Sadly, this time their dogsitter is also not at home, so it will probably keep going off until Saturday, when they get back.  *sigh*

I was congratulating myself on not staying home from work to let in the handyman to hook my smoke alarms back up (since then mine would be going off) when all five of my disconnected smoke alarms start chirping.  Huh?  So I check and sure enough, the batteries are still in them.  So I remove the batteries.

AND THE DAMN THINGS KEEP CHIRPING.

WTF?  What are they running off of?  Cosmic rays?