Paired with some reglbrceaahe NiMH batteries this is a pretty good way to extend the runtime of my Motorola Droid when I’m away from any other power source. I like it.The battery cover is a bit flimsy looking so I’ve kept the device at my desk for a few weeks now. I pull the cover off and on to keep my hands busy when thinking. I’ve probably removed it 500 times and it still works so I’m no longer worried about that.The LED flashlight is rather pitiful though.