I took this charger to CES 2013.  As anyone who's been to CES knows, a single charge on a phone doesn't last the whole day.  I bought this product right before I left to use with my iPhone 5 (also a recent purchase).  My first impression taking it out of the box was how small and light it was.  I was expecting something bulky and heavy.  My next impression was how nice it looked.  Now I never heard of NewTrent before this and bought this simply because of the price and Amazon reviews so my expectations weren't high.  I charged it up the night before and towards the afternoon my iPhone was getting low and I plugged it in.  Worked like a charm.  Walking around about an hour let it charge up enough that I was satisfied.  I met up with a friend who also was running low from his phone and I charged his too.  This repeated the next 3 days.