Es4

The Segway Ninebot ES4 is the flagship of the foundational ES line (ES1/ES2/ES4), launched in 2018 and built around a 300 W nominal front hub motor that peaks at 800 W. Its defining feature is modular range extension: a removable external 187 Wh battery is mounted on the steering stem alongside the internal 187 Wh pack, giving a combined 374 Wh (36 V, 10.4 Ah). This allows a manufacturer-quoted top speed of 30 km/h (18.6 mph) and a maximum range of up to 45 km (28 mi), though real-world testing tends to return roughly 32-37 km depending on rider weight and speed. The scooter rolls on solid tubeless tyres (8-inch front, 7.5-inch rear) with front and rear shock-absorber suspension, brakes via a combined electronic regenerative (KERS) front and mechanical rear foot brake, and adds a one-step folding stem, an integrated LED dashboard and Bluetooth app connectivity. Segway is a US personal-transport brand founded in 1999 by Dean Kamen and owned since 2015 by China's Beijing-based Ninebot; the combined Segway-Ninebot is the global market leader in consumer electric kick-scooters, and the ES line was an early flagship of that combined entity.