Cripes that is expensive, though the spec does look VERY good. I would be put off spending anywhere near that much by worrying about the ability of the USB port to withstand weather. Do you find it a problem? Must admit that the more I read about these things I am tempted to wait to see if prices fall/the things get better and just continue with my Anker 21,000 powerbank and maybe get another. I'm very impressed with it.