in the video 0:21, shows the same battery in pictures on the website, 0:27 shows the battery and in use via the drone. 0:57 shows the battery again at another angle,
you have plenty of evidence here, your just deciding not to see the battery.
given the nature of the business and again, your not holding id say your out for a cheap by in again. fyi: my visit to Perth was awesome, you need to eat a hat.