@holsta@bleeptrack I looked these up to learn more, and Wikipedia has this gem:
"When a City El is retrofitted with 100 Ah Thunder-sky lithium-ion batteries, the car becomes approximately 70 kg (150 lb) lighter, bringing the weight of the City El well under that of some motorbikes. At this point the driver has to take extreme care driving at 50 km/h (31 mph) or more in moderate crosswinds to prevent the City El from being blown about."