My wife has one of those Swifter Dusters for cleaning vinyl floors. It sprays a little solution out each time you you press the button on the handle. She replaced the 4 "AA" batteries in it and it didn't work. I took it apart and checked the little 6 volt pump motor with a power supply and it ran just fine. I checked the output of each battery independently and found one of them had reverse polarity. I never saw this before. I replaced that one battery and her duster works just fine. We have a happy home tonight...
Just because batteries are new out of the package don't mean they're good!!
Just because batteries are new out of the package don't mean they're good!!