Anyone use one of these? I got the USB rechargeable one for Xmas last year. It pretty much sat unused since then, until last weekend when we woke up to some dense fog and I wanted to throw it on the bike just so I could be seen a bit better by cars coming at me. Well, as you could probably guess...it was dead, surely from sitting unused for the past 5 months. So I plug the USB attachment into my Mac, attach the Flea (it attaches with tiny magnets) and I see the lights flashing, which indicates that it is charging. Later that day, I unplug it from my computer, hit the button to turn it on, and...nothing! It's like it never even charged, even though I saw the lights flashing that would indicate that it was charging. I'm stumped. So now I have a brand new, never used Flea light that I cannot get to charge. I would return it, but I'm sure the receipt is long gone by now. Any ideas???