The battery is not more efficient - TFA doesn't mention anything about charging efficiency at all. TFA also doesn't mention anything about the weight of the bat

The battery is not more efficient - TFA doesn't mention anything about charging efficiency at all. TFA also doesn't mention anything about the weight of the battery. The vehicle has a coefficient of drag of 0.21 (versus the Model S Cd of 0.24). Curb weight of the vehicle is apprarently 4630 lbs, lower than Tesla Model S (4,880) perhaps due to reduced weight of the drive-train or other components. The right way to describe the battery is that it is higher capacity. It may also have a higher charge/discharge rate, or a higher energy density, but they have not made any specific claims here, just rather generic boasting.