Great Reviews for Vapextech batteries. This is the cheapest I have found and this includes PP. All others are selling for than £7.99.
High Power AA 2900mAh Vapex rechargeable batteries are designed to meet the most stringent needs of today's high drain applications such as Digital Cameras (exceeded 3 times more shots and longer-lasting than normal alkaline batteries), MD & MP3 players and other portable devices.
I have ordered them to pair with this http://www.ebay.co.uk/itm/AA-EMERGENCY-CHARGER-IPOD-IPHONE-4G-CAMERA-MP3-UK-/290579283541#ht_1670wt_1037. I hope to charge my cell phone with these. Let's see.