Right if I put my usb charger in my pc it intially glows green as it has nothing attached,if I then attach battery after a little bit of turning it goes red, but if I screw it on all the way it goes back to green, do I want it screwed tight and therefore my battery doesn't need charged , in which case I think I need a new one or have I been screwing it to tight? I'm thinking the latter as the blue light flashes on the button but don't want to wreck the battery? I