Although not as good as the previous offer https://www.ozbargain.com.au/node/198303.
The "Lithium Coin" 3.0 volt Energizer ECR2032 is designed to have a long shelf life and provide continuous energy under most temperatures. Extremely durable, it has found favour in compact devices that require the exact properties exhibited by the CR2032 cells – durability and longevity
Damm and I just bought a 10 pack for $7 - http://www.ebay.com.au/itm/141308447096