https://techcrunch.com/2019/08/23/the-2020-chevy-bolt-ev-now-has-a-259-mile-range-thanks-to-some-cell-chemistry-tinkering/

The 2020 Chevy Bolt EV now has 259 miles of range, a 9% increase from previous year models of the electric hatchback, according to the EPA.

To get there, the company focused on cell chemistry, not the battery pack. The GM brand did not add more battery cells or change the battery pack or the way it is integrated into the vehicle structure, a spokesperson confirmed.