Energy capacity and battery density --- what it really means Tesla batteries have a capacity of 75 Kwh for model 3 and 100 Kwh for the model S allowing a range of approximately 370 miles or 600 KM.
The life span of these batteries packs is between 300,000 and 500,000 miles or 480,000 to 800,000 Km as the batteries normally cannot be charged and discharged more than 1500 times
A 10x increace in capacity would allow either batteries of 750-1000 Kwh allowing a range of 3,700 miles or 6,000 Km or ten times less batteries to allow prior range using traditional batteries.
The life span of these new silicon li-ion batteries would theoretically be 10 times batter than what the traditional batteries were able to provide
Furthermore the battery density being spoken by Peter Pascali, I assume, is the Gravimetric energy density which measures the Watts Hour per Kg. The use of silicon as an anode material would thus reduce the weight of the batteries by 20%-40% as compared to traditional batteries. This is absolutely HUGE as noted by Peter.