sentences:  It was first put into practice between 1910 and 1924, by Hartford Electric Light Company, through the GeVeCo battery service, and was initially available for electric trucks.The vehicle owner purchased the vehicle, without a battery, from General Vehicle Company (GeVeCo), part-owned by General Electric, and the electricity was purchased from Hartford Electric through the use of an exchangeable battery.Both vehicles and batteries were modified to facilitate a fast battery exchange.