The e-scooter, e-bike and dirt bike range calculator. Pick the numbers, see what they really do, then the closest real ride.
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Real world: 85 kg rider, mixed speeds. Tap a row for the why.
Divide the battery's watt hours by the watt hours it uses per kilometre. A 48 V 15.6 Ah battery holds about 750 Wh, and a typical scooter uses roughly 15 to 18 Wh per km at 30 km/h: about 40 to 50 km of real riding. Weight, hills, cold and speed all cut it.
Volts × amp hours. 48 V × 20 Ah = 960 Wh. Watt hours, not amp hours on their own, tell you how much energy is in there.
Only up to a point. Air drag grows with the cube of speed, so going from 45 to 70 km/h needs roughly three to four times the power at the wheel.
Amp hours ÷ charger amps, plus about 10 %. A 20 Ah battery takes about 11 hours on a 2 A charger and about 4.5 hours on a 5 A one.
Higher voltage gives the same power with fewer amps: less heat in the wires and controller. 48 V is the common middle, 60 to 72 V suits 2,000 W motors and up.
In the EU it counts as a bicycle when the motor only helps while you pedal, stops at 25 km/h and is rated 250 W. Faster or stronger ones are mopeds. Rules vary, so check your country.
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