Recently, NIO's third brand, firefly, has introduced a Battery as a Service (BaaS) battery rental and purchase plan. With this plan, the car purchase price is immediately reduced by 40,000 yuan, and the monthly battery rental service fee is 399 yuan. According to official information, the selling price of the firefly Zizai Edition starts at 119,800 yuan, and the Faguang Edition starts at 125,800 yuan. By adopting the BaaS battery rental service, the car price is immediately reduced by 40,000 yuan. The Zizai Edition car model starts at 79,800 yuan, and the Faguang Edition starts at 85,800 yuan, with a monthly battery rental service fee of 399 yuan. BaaS, which stands for Battery as a Service, is a battery rental service launched by NIO on August 19, 2020. Its biggest appeal lies in the "separation of the car and the battery," where the battery is rented on a monthly basis, reducing the pressure of car purchase.