No need to worry about the Manga files. It turns out that when I deleted those files and re-saved my images, I just made a double sized set of images... the old ones with the battery image and the new ones without it. It took a while to cycle through the images to realize that the manga files had no effect.
Once I got in to the screen_saver folder, I deleted everything (I was unable to figure out individual images) and started from scratch. Now I only have the images without the battery picture on them.