Submitted by goldwein on Fri, 2019-02-15 06:40
I know there are those who are wondering, so I did the calculation. If the 100kWh battery of your Tesla is topped off, the added weight is 4 x 10-9 kg compared with a completely empty battery.
Seen from another direction, once Elon decides to go nuclear, the fuel weight will be negligible.
Someone please check my work :-)