Well I'd like to compliment Trent on this product.  It fits my needs very well.  With one of the large screen cell phones (HTC EVO 4G) I run through my battery very quickly if I do any extended usage.  I'd have to find a PC or carry a wall charger with me all the time.  Now I don't need to do that, I get at minimum one full charge and some more out of this unit.  This will get me through a heavy use day no problem.