Australia Post Bans Lithium Batteries

Australia Post will no longer be accepting packages that contain lithium batteries by air. The batteries have been classified as dangerous, leading the International Civil Aviation Organisation to enact more stringent controls. This follows on the exploding laptop batteries debacle of 2006, prompting a recall, and further recalls in 2008 and 2009. Lithium batteries may still be sent by road, but only if they are lithium-ion and rated for 2 grams, 100-Watt-hours or under. Most devices should fall under this requirement, although in the
official document
(PDF) Australia Post mentions that Equipment will not be safe to send if it contains more than two batteries/four cells — six-cell batteries being common in laptops