From January 13 to February 5, all of 's battery swap stations along highways are open to vehicle owners for free and unlimited use.

Nio's (NYSE: NIO) battery swap service sees a new milestone as China hits its holiday travel peak.

Nio's single-day battery swap services reached 50,000, figures the company shared on Weibo Monday show.

A chart shared by the electric vehicle maker shows it provided 45,494 battery swap services on January 13, 51,040 on January 14 and 55,481 on January 15.

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During these three days, Nio's battery swap stations located along highways provided 9,671, 12,294, and 13,333 services, respectively, for a total of more than 35,000 services.

As of January 16, Nio had 1,311 battery swap stations in China, 348 of which are located along highways, according to data monitored by CnEVPost. The company also has 2,307 charging stations, offering 13,560 charging piles in China.

January 21-27 is the Chinese New Year holiday this year, and the week before the holiday is usually the peak of travel for people, especially this year with the lifting of Covid restrictions in China.

From January 13 to February 5, all of Nio's battery swap stations along highways are open to owners for free, unlimited access and operate 24 hours a day, according to information shared by the company last week.

Most Nio owners currently have the right to 4-6 free battery swap services per month.

On July 5, 2022, Nio announced that it reached the 10 millionth battery swap service milestone, as the service has become the preferred method of replenishment for its owners over the past four years.

Nio completed its first battery swap station in Shenzhen on May 20, 2018. Nio owners were skeptical in the early days of battery swap, but as they have experienced the convenience of the service over the past few years, battery swap has gained widespread acceptance.

It took Nio 29 months to see its battery swap service reach its first 1 million, 20 months from the 1 millionth to the 9 millionth, and only 1 month from the 9 millionth to the 10 millionth.

The company officially unveiled its third-generation battery swap station at the Nio Day 2022 event in Hefei, Anhui province on December 24, capable of storing up to 21 battery packs, up from 13 in its previous generation and 5 in the first generation of the facility.

The third-generation battery swap station increases the daily service capacity of a single station to 408, a 30 percent increase over the second generation.

Nio's third-generation battery swap station will be available starting in March 2023, the company said at the time.

In addition to announcing the new battery swap station, William Li, Nio's founder, chairman and CEO, said Nio aims to have more than 1,700 of the facilities in China by the end of 2023.