Lithium ion battery has
Lithium ion battery has weight density of average 2.6 kg/L. 650 Wh/L is equal to 250 Wh/kg.
Go to the spec of model 3 and find out for your self.
If I am wrong a few percent than it is ok. If I am wrong more than 20% than get back to me.
This author deliberately making a mistake to deceive people.