We have 2 units of the Alkaline 9V Battery in stock at our Sydney warehouse.
Alkaline 9V Battery
We can get a further 100 units from Adafruit Australia.
If you order today we can dispatch this stock between Friday, Sep 28 and Friday, Oct 05 2018.
Adafruit's Description of the Alkaline 9V Battery
Battery power for your portable project! These batteries are high quality at a good price, and work fantastic with any of the kits or projects in the shop that use 9V
These batteries are Alkaline (MnO2) chemistry, with a voltage range of 9.6V (fresh) to 4.8V (dead). The mAh capacity depends on discharge usage but at 50mA rate it is about 500mAh (check the datasheet in the download tab for more details)
These work perfectly with our 9v clip, 9v holder, and digital multimeter