Seems like a great price and i hear these are re-badged (legendary) Eneloops and are made in Japan for Duracell.
Also 8 pack available for an even cheaper per unit price £10.80 including free delivery.
Duracell rechargeable batteries offer you the quality and dependability you've come to trust from Duracell
High performance 2000 mAh AA batteries ideal for digital cameras
100s of charges and up to four times more photos compared to ordinary alkaline batteries
Compatible with all Duracell battery chargers
Great for the environment
Please click through this link and 5% or more of your purchases could be making its way back to Macmillan.http://shop.macmillan.org.uk/amazon.html
It really is that easy, you don't need to do anything else and it won't cost you a penny.