I purchased a bunch of these power banks from a camping store that was going out of business.  I have found them extremely useful for charging my cell phone and other optics on camping trips.  I have used it to charge my Thor Thermal Scope and have even used it as a secondary battery pack for my Thor Thermal.  I simply set it outside my tent and let it charge.  It also has a nice bright built-in flashlight and magnetic charging for my phone.  You really can't beat these power packs, and they'd make a great Christmas gift.  I'm not really trying to make anything off of them.  It was one of those impulse buys, because they were such a good deal.  And then I realized what am I going to do with all of these.  I'm asking $15.00 each, or 2 for $25.00.  They are all brand new in box. Pickup in and around Fostoria or Tiffin, or I will ship.  For anyone that spends a lot of time in the outdoors, this is a must-have.  I also keep one in my car in case of emergencies.  If nothing else, this is a perfect stocking stuffer.