Got this and tried it. It's a lovely gimmick. It works with my BlackBerry device, but it wont work with any Apple device (iPhone, iPad, iPod). Tips: Constant pedaling, don't waste your energy rushing off the pedal.
I'm using this battery to power up my noise canceling headphone. I've been using it for about 2 months, and charging it with USB charger, so far no problem, it is still performing well. No leakage, or unexpected power drainage or whatsoever. Good product, and I love the fact that it is brand-less :)