Thank you Duracell, and Amazon... and whoever I may have bought the portable charging unit from...
Simply, I am very impressed with it.
You plug it in the wall.
It stops charging when its full.
You plug your device with a USB charge cable into it.
... And it charges!
It doesn't charge as quick as if your device were plugged into a wall socket charger. But to be honest, I wouldn't expect that anyway... There may be larger capacity alternatives out there that boast 3-4 full charges and charge as fast as, if not faster than, a wall socket charge, but that makes me wonder what its doing to my devices battery health... You do get at least 1 full charge with this one and some left over with an iPhone 4S and an HTC Desire.
In any case I stuck with a name brand and i'm very satisfied. Would recommend to everyone. Thanks again.
Oh, and in case you're wondering what's included, it comes with the unit, with a little flippy out arm bit for some devices to connect straight to it, a cable that goes into the unit and the other end into a USB so that it may be charged, and a USB port for you to use your own charge cable to charge from.
Can charge unit from PC, Laptop and wall socket USB adapter charger such as iPhone and HTC etc. And thats that! Hope I've helped!