Here what I've found on the Internet, rather interesting to my mind and the price is appealing
here it ishttp://laneri.com/
and some characteristics:
Capacity - 1350 W/h
Range - 180 km
Range with pedaling - 300 km
Weight - 34 kg
Top-speed - 40 km/h
Limit current – 15 A
Efficiency – 80%...