You could always pick up a well designed external backup battery from a well known brand at some ridiculous cost, which in most cases barely has enough of a capacity to keep up with all of your gadget charging needs. Or you can take a seemingly riskier bet on an unknown external battery that offers ten times the capacity of a popular brand name battery, but at more than half the price. It'll always seem to good to be true, and in some cases it is. We're always up for testing out faster, better, higher capacity portable external batteries and this one in particular turned out to be a solid winner. 

So that's why we've been hard at work testing out Intocircuit's new 2nd Gen Power Castle backup battery pack and all of its promising advertised charging prowess. It's a 15,000mAh external battery bank with dual USB charging ports that can simultaneously deliver 2.4A of charging power for quick charging of pretty much anything that charges over USB. Intriguing consider most other similarly sized batteries will only have one high-speed USB charging output while the other will only deliver a measly 1A of power. More on the Power Castle's charging performance in our in-depth review after the jump!