We have been testing a " New Generation" of Lithium Poly rechargable batteries for a few months now. These cells are 7800mAh in capacity and can be discharged 35 amps with up to 60 amps peak.

The Funtana in the video is at about 30 amps in hover and 53 amps peak.

Best regards.
Sean Plummer
http://www.hackerbrushless.com