I am currently developing a 100,000 mAh prototype for the Galaxy Note 2. If enough interest is generated in the forums, I may proceed and manufacture a small run of them. The battery will be available through a direct mount phone case as a standard setup, but I am actually in the process of developing a micro USB adapter to backpack carry system as well. If the OP is interested in reviewing/testing either of these prototypes, I would be happy to send a free sample product.
Here is a sneak peak at one of the earliest prototypes! Obviously the design has vastly improved through many iterations, but just to give you an idea:
Feel free to PM me with any questions.