yeah i could trie yours too.. but i think its not a matter of the images itself... in the "standart" non-modded firmware i also got only 4 or 5 different levels shown just like yours.. i made some images from green over yellow and orange to red and grey (empty) as a replacement for the standart ones.. since i replaced the original "full battery" image with mine it now should show this one.. instead it shows my grey one.. as if it now runs the list of images backwards
but i'll continue to play around with this issue