This is awesome! For sure a nice Christmas gift for the friends. 2-pack would cost you around $23CA though, including shipping charge. The company, usbcell.com, that invented and sells this product is located in UK but ships world-wide, so if you want it you can definitely get it. AA type of rechargeable batteries are their main product line but they also have AAA batteries, 9V battery cell, and batteries for portable devices like cell phone. Pretty neat!
