I saw and bought this from my local ASDA (Holt park, Leeds) store. I am sure, its available nationwide in all stores as there were many on the shelf.
It scans as POWER2GO4420 at the till.
Amazon is selling this for £28.98
WITH THIS YOU CAN CHARGE YOUR PORTABLE DEVICES ANYWHERE. YOU ARE NEVER LEFT WITHOUT POWER IN THOSE CRUCIAL MOMENTS ! THIS SMALL MONSTER HAS 30 HOURS OF POWER!
With this compact power pack you never have to run out of power on trains, at airports, at stations or wherever there is no wall outlet available. Don't be left powerless - take charge anytime, anywhere! Work, talk or play for as long as you like.
Charges your mobile phone (Nokia, Samsung, Motorola, Sony-Ericsson) IPod, GoGear, PSP, Digital Camera and other portable devices that can be charged via USB.
To give you an idea of its 'power', I have charged my IPod Classic two times and the recharger still has half of its charge for use with any other gadget!
You can see the owners manual & product specifications at:http://www.consumer.philips.com/consumer/en/gb/consumer/cc/_productid_SCE4420_10_GB_CONSUMER/Power2Go+SCE4420-10