For you guys and gals that upgraded from a Rumor Touch it should be noted that the batteries are cross compatible. The other night I decided to pop one of my two Rumor LGIP-401n batteries out and compare it to my Optimus LGIP-400n and they are the same fit. Now I'm lucky enough to have three batteries for my Optimus which is a very good thing as I use Digitally Imported "DI" Radio, a Live Wallpaper, and an 864Mhz clock 24/7.