Pls advise if anyone happens to find a better deal than this for Alkaline batteries. I haven't as yet. This is quite a bargain:
10xAAA: http://www.ikea.com/au/en/catalog/products/30094714/
10xAA: http://www.ikea.com/au/en/catalog/products/40031603/
2xC: http://www.ikea.com/au/en/catalog/products/90031605/
2xD: [don't have them online, but are instore]
1x9V: http://www.ikea.com/au/en/catalog/products/20031604/
They also have 8xCR032 lithium batteries for $4.99
http://www.ikea.com/au/en/catalog/products/60207130/
EDIT: Rechargables also available:
$19.99 8 pack: 4xAA (2000maH), 4xAAA (750mAH) http://www.ikea.com/au/en/catalog/products/00118194/
$19.99 recharger + 6 batteries (4xAA, 2xAAA) http://www.ikea.com/au/en/catalog/products/50114674/
in long run, rechargeable is probably cheaper.