So it used to be rated at about 335mpc (miles per charge)? And 20% yanks it up to 402? That must be an incredible mass savings something like 10% I'm guessing

So it used to be rated at about 335mpc (miles per charge)? And 20% yanks it up to 402? That must be an incredible mass savings something like 10% I'm guessing, on a car that is already built on an all-aluminum unibody. I hope the NHTSA crash ratings are not affected!