Maybe not everyones essential item, but having been looking around for a set of rechargables this is the best price I could find for these (typicaly twice this). These are their version which stay charged as the names suggests for a long time, and they still have a decent power output.
If you want the AAA equivalent they are also on Amazon for £7.39.
And if you are looking for a matching charger you can find the 1 hour charge unit on Amazon for £17.99 sold by Eurobatteries with free delivery too and this comes with two of each of the above batteries.
So hopefully this will be of use to someone.