The Vision Spinner II battery has a ton of clones out there. I purchased one from a store and one online and neither are the real deal. If you are having issues then chances are you have a clone. Keep in mind that it's getting harder to tell the fakes from the real deal. You'll read this a lot on this forum: you get what you pay for. Mine seem to work well and don't have the same issues others are reporting. I'm not sure if I am lucky or not since I've only had them for a couple of months.