It is a Maxell 5200 mAh portable power source and the reasons I bought it apart from the price was the fact it is smaller than my current one and more importantly a great deal lighter.
It is smaller than an iPhone as you can see in the picture and has two USB ports. One is specially for an iPhone / iPad and the other is for other items. It is charged via the micro USB in the centre and typically takes 6 hours to fully charge from empty.
My current charger is the same power but has never been able to charge my iPad and iPhone together for reasons unknown. This one had no bother carrying out this task.
For Brompton adventures this will I am sure come in very handy and its smaller size will prove to be more useful, especially when space is at a premium.