Hdip said..
That square box has two buttons you squeeze in. Remove box from cavity, unplug. Plug in new battery box. Squeeze buttons to press into box. Done.
Yes, I see that, but the battery includes all the electronics of the unit, only the cable and motor are separate. So to compare the offering from Foildrive, the 2P battery unit gives around 30-40 minutes of runtime. This puts it in the FD Sport HP battery range.
The HP Sport battery is around AUD$1200. Add to that a cable, prop, motor and V2 controller and the complete kit price should be under AUD$3000.