Stop and think about charging an 85 kWH battery pack in 5 minutes. Assuming 80% charging efficiency (no idea if that's what it is, just a guess) you will need about 100 kWH * 60/5 = 1200 kW. 1.2 million Watts draw for 5 minutes. 5,000 Amps at 240volts. Totally impossible with our current grid and generating capacity.
