been looking around there are a few 6400mah for £50 quid but this is 5000mah and will charge most devices around 3-4 times at least, from a dead charge.
* Powerful 5000Ma battery charger pack (upto 65 hours extra battery life)
* Will charge most popular devices including iPod, iPhone, Mobile phone, PSP, Nintendo DS, Digital camera
* Will Charge Veho Muvi and Kuzo camcorder series
* Pocket size and lightweight
* Includes carry pouch
thanks tommo111 for the updated price