An electric city bus is an emission-free urban transit vehicle powered by lithium-ion batteries, offering 150-300 miles range and fast charging (30 mins to hours). Key features include regenerative braking, low-floor accessibility, and silent operation. It reduces greenhouse gases and operational costs versus diesel buses, while integrating smart tech like energy monitoring and renewable grid compatibility. As cities push decarbonization, these buses are central to sustainable, eco-friendly transit systems.