JRP3
Hyperactive Member
Looks like 70D battery does weigh the same as battery pack in 60, indicating that 70D is likely using new generation cells that have about 16.6% higher energy density. See this post for details.
As stated in that thread I don't believe there is enough evidence to support that conclusion. I also find it hard to believe that Tesla would only use these "new" cells in the low end 70D and not the flagship 85 cars, though I do admit there could be some strategy in doing so.