http://www.androidpolice.com/2016/04/18/review-deal-alert-a-look-at-ankers-newly-released-power-bank-the-powerhouse-its-highest-capacity-battery-ever-with-a-whopping-120600mah-of-juice/
Wow you could do an entire festival with that sucka...very cool! It would be nice if it had a DC out, so you could leave the wallwort at home.
That looks like a great battery solution!!
Amazon has it for $400.
No affil