The Australian Civil Aviation Authority recently promulgated a rule banning all batteries, of ANY capacity and ANY chemistry, including Primary (non-rechargeable) batteries from hold baggage.
All batteries must be in carry-on luggage, either in their device or packed in an insulating container (paper envelope will do).
So no more than 3 oz of liquid in cabin bag, but an arbitrary amount of "batteries" allowed? The (wrong) possibilities are endless. Brilliant.