Hi guys,
My apple keyboard and mouse is just chewing through my batteries so I just had a look on DSE.com.au this morning. No idea if this is a good deal - it seems pretty good though. Could only order a maximum of 19 x 4pk. They're probably fairly average batteries but I know batteries can be expensive.
Update 3 August 9:11am: The DSE site is now limiting to max 11 packs.