I bought a Thor's hammer a little under one year ago, and it seems the battery drains when it is off, or something like that. I bought it with the extra 3.5mm jack, so I could use the play and charge function. Now, every-time I turn it on, the lights are very dim, and I have to plug it in. I then let it charge while playing, until the charge light on the cord turns green, where I can unhook it and it is fine, and the lights are bright, but not as bright as hooked in. Once I shut it off and let it sit for a while, when I go to turn it back on,the lights are dim again. Sometimes it is so dim that the 4th player light won't even light up to show what mode it is in. It don't take long for it to say it is charged, so I'm not sure the battery is draining, or if there is a problem with the controller.