I just got home from work and the charger was in my mailbox. First of all, the size in the picture is deceiving (it's small), it's about the length of 2 and 1/2 AA batteries and the width of 3/4 of 1AA battery. All you do is put 4AA batteries in it, turn on the power, and plug the cord into the power port of your reader. The charging light comes on and you can read while it's charging. So, far this thing is great; it's exactly as advertised on the website. I will only use it when power outlets or computer is not available because the cost of batteries will add up since it takes 4. So far, I give it 5 stars out of 5!
Also, I just realized that the charger that I received is not the one in the picture, but I'm still happy with it!