Product review (1 stars): Battery contact is a fatal flaw
Although I cant vouch for its accuracy, we liked it a lot until having to replace the batteries, just past the end of the one-year warranty.  At first I thought something was wrong with my brand new batteries, as the unit did not turn on. Ultimately, I figured out that the problem was with the + contact for one of the batteries.  As you can see in the photos, one of the batteries has a typical + contact, but the other has a scrawny spring (like on the  end, but smaller), and it is almost impossible to get the plus end of the battery into good contact with it.  I spent at least 30 minutes trying to finagle it  not something I want to have to go through every time the batteries need to be replaced.  Extremely aggravating, and clearly a design flaw. Ive seen plenty of electronic devices that use two AAA batteries, but Ive never seen such a poorly designed battery arrangement as this one.