Electric vehicle startup Rivian, backed by Amazon.com Inc and Ford Motor Co, has announced that it has join forces with Samsung SDI as its battery cell supplier.

Rivian had been working with Samsung SDI “throughout the vehicle development process”, according to a declaration.

Rivian anticipated R1T pickup and R1S SUV, known as “adventure vehicles,” necessitate a battery module and pack that can handle extreme temperatures and durability use cases.

South Korea-based Samsung SDI already supplies battery cells to other manufacturers. In 2019, the company signed a $3.2 billion deal with BMW Group for a 10-year supply agreement.

“We’re excited about the performance and reliability of Samsung SDI battery cells combined with our energy-dense module and pack design,” RJ Scaringe, CEO, Rivian said in a declaration.

“Samsung SDI’s focus on innovation and responsible sourcing of battery materials aligns well with our vision.”