I picked up one of these last month when it was on sale for $35
12000 mah
http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
I really really like it
The Cables that it comes with are okay but I use my own anyway.
the 2.1a charge port is a nice feature - so is the cable carry bag.
edit:
sorry i missed the part about a regular outlet - i dont know anything that would have that except perhaps a car inverter