Toyota is partnering with Redwood Materials, a battery recycling company helmed by Tesla co-founder JB Straubel, to collect and recycle vehicle batteries. The plan is to take old, worn-out batteries and either refurbish them or break them down so their materials can be used to create new batteries.

Redwood specifically plans on producing materials for anodes and cathodes — two major components of a battery cell. The company’s ultimate goal is to create a “closed-loop supply chain for electric vehicles,” meaning that it takes batteries from old EVs and turns them into batteries for new cars.

While Toyota is currently launching its first long-range battery-electric vehicle, newer cars aren’t the current focus of the partnership’s efforts, given that their batteries are still relatively new.

Instead,Toyota and Redwood are focusing on “the first wave of battery-electric vehicles,” which are over 20 years old and nearing their end of life. Mostly, that means first-generation Toyota Priuses in California.