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.

Instead, Chevrolet’s battery engineering team made what the company described as “impactful changes to the cell chemistry.” The changes to the cell chemistry allowed the team to improve the energy of the cell electrodes, and ultimately enabled them to squeeze more range out of the battery.

The increase pushes the 2020 Chevy Bolt ahead of the Kia Niro and the standard range plus variant of the Tesla Model 3, with 239 and 240 miles of range, respectively. Other versions of the Model 3, the long-range and performance, have a much longer 310-mile range. It’s also just one mile better than the 258-mile range Hyundai Kona EV. Nissan Leaf Plus, the laggard in the group, can travel 226 miles on a single charge.

That might not seem like much. But in this small, yet growing pool of electric vehicle models, jumping from 238 to 259 miles could help Chevrolet sell more Bolt EVs next year. It could also cannibalize sales this year.

The electric vehicle has never been a top seller for the GM brand, particularly compared to its top-selling SUVs and trucks. It has beat out some of its other Chevy models and sales are high enough for the company to stick with the compact hatchback for now.

GM delivered 23,297 Chevy Bolt EVs in 2017, the first model year of the electric vehicle. But the following year, deliveries fell 22%, to 18,019. Sales have rebounded in the first half of the year.

The 2020 model year, which will be offered in two new exterior colors, is expected to arrive in dealerships later this year. The base price of the electric vehicle is $37,495, which includes destination and freight charges. Tax, title, license and dealer fees are excluded.