I bought this to charge my iPhone 4s and the kids ipods while on the road.  It is working well and boasts an additional 24 hours of talk time, though I can't say we've expended that yet.  It is confusing when you open the package - there is a little 4" USB cord male/female.  It basically looks like a very small USB extension cable.  Please note (and you wouldn't know this unless you read the 'instructions' back to back - according to the directions, you MUST use this to extension to plug most (all?) of your USB cables into to prevent damage to your unit - honestly, I don't know why this would be, but I won't risk trying since they sent the needed cable).  Sleek unit, much nicer size than the older versions.  We have a total of 3 New Trent batteries (one for each of us) and this one seems to be quite a bit nicer than the 2010 versions.