E2/K20 Electric Bike Compared: Surprising Benefits Of 750W/1000W Power For All-Terrain Use… We were intrigued by the E2/K20’s dual power options—the 750W and 1000W models—and their impact on performance. The 20" or 26" fat tires, paired with a 48V 13Ah/15Ah battery, delivered smooth, stable rides over rugged terrain. We tested the 1000W version, which effortlessly surged up hills and maintained top speed at 28 mph, while the 750W offered a more balanced, energy-efficient alternative. The UL certification provided peace of mind, and the moped-style design kept us legal on roads. What impressed us most was how the extra power didn’t just increase speed—it improved confidence and adaptability. Whether navigating cityscapes or off-road trails, ours remained responsive and reliable, proving that higher wattage truly enhances all-terrain versatility.