Just bought 2 x 4 packs of AA Energizer Lithium batteries for £5. They are marked up at ££6.96 each, but have a label on the display saying 'buy 2 for £5.00'.
That's what I did.
Receipt shows 2 items with a total price of £13.92, with a multibuy saving applied of £8.92.
Seems like a good price to me - 8 AA lithium batts for a fiver.
These were purchased at Asda home in Byker, Newcastle, but the display labelling seems to suggest in will be a deal available elsewhere as well.