Just another thought. Another cheaper solution that wouldn't require messing with batteries is to get a second 1-Spot adapter. My only question would be (since I am not an electrical engineer) is this: if I plug both 1-Spots into the same extension cord am I going to have the same problem since they will share a common ground at that point? Or would the two be isolated enough? My uneducated guess is that it would be enough isolation because even with a power brick ultimately there is a common ground when you plug it in.

Of course, that wouldn't solve the problem if there is indeed a short or some other flakiness in my daisy chain. At this point I'm thinking that moving the plug around is just making noise because of the noise that's already there. It never actually cuts out.