ENGWE has launched the L20 e-bike in the US and Europe. The US model has a 750W motor and a top assistance speed of 25 mph (~40 kph), while the UK/EU model has a 250W motor for a 25 kph (~16 mph) top speed. Both models can travel up to 90 miles (~140 km) between charges.https://www.notebookcheck.net/ENGWE-L20-new-e-bike-with-90-mile-range-arrives.716339.0.html
Since you are interested in tech, this one's related to ev as well. Here's a good read.They call it "range extender system for electric transport."
autocarindia.com/auto-features/its-electric-its-ecycle-403537
youtu.be/4KSs1fdjCOo