Apple's collaboration with Chinese battery company BYD on battery development for its now-canceled Apple Car project has been revealed.

The details, which remained under wraps until now, come from people familiar with the situation who spoke to Bloomberg. According to the sources, the iPhone maker

For years, Apple was rumored to be working on a futuristic self-driving car, with the company tied to collaborations with Volkswagen and even a potential deal to buy McLaren at one point. That never happened and the project was canned after 10 years,