NYC finds structural damage in parking garages, closes 4. Note that NYC is not in an earthquake zone. Gasoline weighs 6.35 pounds per gallon, so a 16 gallon tank weighs 102 pounds full but 0 empty. An electric car battery weighs 1000-1200 pounds and the same discharged. The extra weight of electric vehicles is a problem for roads and garages. This is rarely mentioned when the virtues of electric vehicles are extolled.