Attached are two images of the inside of one of those devices to extend the battery life of your phone. This one was a promotional giveaway and only had their logo on the outside. I tried searching for the text in the second image, but nothing that comes up is likely. I'm hoping there is something I am not realizing in the image that would help my research.
!! Update !! I found another one. The little chip reads ETA9640 / 5486B.