Mercedes-Benz confirms it has commenced production of a massive new battery pack. This new pack is slated for the upcoming EQS flagship EV sedan, which will be revealed on April 15th.

While Mercedes’ announcement was centered on starting production of the battery at its Stuttgart-Hedelfingen plant, that isn’t the headline. This is the first time the automaker has confirmed the EQS battery size as 108-kWh. The battery capacity also aligns with the range estimates Mercedes has offered. Previously Mercedes has said it is aiming for more than 700 kilometers (around 425 miles) of range on the EQS.

Not every iteration of the EQS will see the massive 108-kWh battery pack. Mercedes confirms in its press release that the EQS is designed to accommodate multiple battery sizes for various range and performance deltas between trim levels. This comes as no surprise and aligns with the approach of just about every EV maker.

Production of the EQS battery is made possible by a $1.1 billion investment the company announced last year surrounding battery production. The investment called for the establishment of nine battery factories around the globe.

Mercedes is planning to launch four new battery-electric models in the U.S. over the next two years. The upcoming EQS will be the first Mercedes EV to launch in the U.S. later this year. Stay tuned on April 15th for more information on the EQS.

Wondering which brands have EV’s coming? Check out our Electric Vehicle Compendium.