We know that the 2021 Lucid Air will charge extraordinarily fast and has a class-leading EPA estimated range of 517 miles (832 km). Now, as the days tick over until the car’s debut on September 9, we have details regarding the EV’s battery pack.

Sitting beneath the sleek bodywork of the Lucid Air is a 113 kWh battery pack, smaller than the 130 kWh battery that many pundits thought the Air would have.

According to Lucid, the Air’s battery pack hasn’t just been built to provide exceptional range but has also been designed to be compact and energy dense, allowing the car manufacturer to maximize interior space.

“It’s relatively easy to achieve more range by adding progressively more batteries, but gaining ‘dumb range’ that way increases weight and cost, and reduces interior space,” Lucid chief executive and chief technology officer Peter Rawlinson said in a statement. “Lucid Air has achieved its remarkable range whilst also reducing battery size through its in-house technology, resulting in a breakthrough in overall vehicle-level efficiency.”

Read More: 2021 Lucid Air Has An EPA-Estimated Range Of 517 Miles

Lucid claims the Air offers “unprecedented” interior space for its compact exterior footprint. The EV also has a frunk offering 280 liters (9.8 cubic-feet) of space and in total, offers up an impressive 739 liters (26 cubic-feet) of luggage space.

“By pursuing this ‘smart range’ approach, Lucid shall not only be able to offer the Air with this unprecedented absolute range, but also offer future models that achieve competitive range from proportionately smaller battery packs, thereby saving cost, weight, and space,” Rawlinson added. “Lucid’s breakthrough is not merely just a few percent; we are talking about a significant improvement, which I shall cover further on September 9th. This represents a true breakthrough and what excites me the most for the future and for Lucid’s role in advancing electrification and sustainable mobility.”

Note: Lucid Air concept pictured.