Temperature abnormality / quick circuit / under voltage automatic sleep / over current / over charge / over discharge safety "Making e-scooters more visually and audibly detectable will help decrease the risks these vehicles pose but they're only several of the methods that are being explored," Mr Haddad added. https://griffinltxbc.ltfblog.com/29297098/about-collapsible-electric-scooter-for-adults-drop