Guys as above
6 pack of Energizer Ultimate Lithium AA / AAA batteries for £5.99 delivered at MX2.
These arents just any old batteries, these are top of the range, long life batteries perfect for digital cameras (or in my case my Active 10 GPS for mountain climbing). These are fantastic batteries and last so much longer than the standard alkaline ones.
The direct link is to the AA's but the triples can be found here:http://www.mx2.co.uk/default.asp?part=AAAL6