Current Lithium storage density for state of the art batteries is about 250 W-h/kg (yes, I know, stupid unit). How much is this in MJ/kg? It has been said that a lithium-ion battery has a lower energy density than a ham sandwich. Compare with the nutrition label below and confirm or deny.

Nutrition Facts Serving Size: 1 sandwich (2389) Amount Per Serving Calories 409 Calories from Fat 125 % Daily Value 22% 19% Total Fat 14g Saturated Fat 3.7g Trans Fat og Cholesterol 50mg Sodium 1479mg Potassium 500mg Total Carbohydrates 48g Dietary Fiber 4.6g Sugars 6g Protein 22g 17% 62% 14% 16% 18% Vitamin A Vitamin C Calcium Iron 54% 14% 16% 24% * Percent Daily Values are based on a 2000 calorie diet