South China Morning Post
https://www.scmp.com/business/china-business/article/3275218/chinese-ev-maker-nio-amp-battery-swap-network-900-faster-stations-year
Chinese EV maker Nio to amp up battery-swap network
The company will add 900 swap stations this year that promise to get drivers back on the road in 2.5 minutes. However, advanced batteries are eating into the approach’s time advantage.