so would something like this serve my needs better?

http://www.woot.com/offers/gorilla-16-800-mah-battery-pack-w-led-screen-11?ref=cnt_dly_img

or possibly a combination of both? the solar for the times i can reliably charge in the sun and the other above as a back-up?

As I said, my intended use for this is charging phones, maybe an ipod or tablet, in the event I am away from power at a primitive campsite or at home in the event of a power outage. Now, what that means in how much "juice" I need to accomplish that, I have no idea.