Electric Scooter Glossary
Every spec sheet term explained in plain English. New to electric scooters? Start with our first scooter buying guide, then come back here whenever a term needs decoding.
- Amp-hours (Ah)
- A measure of battery charge capacity. Multiply amp-hours by voltage to get watt-hours, the more useful number for comparing scooter batteries. A 36V, 10Ah battery holds 360Wh.
- Battery Management System (BMS)
- The circuit board that protects a lithium battery from over-charging, over-discharging, and overheating. When a scooter appears completely dead after deep discharge, it is usually the BMS in protection mode. Troubleshooting a dead scooter →
- Deck
- The platform you stand on. Wider and longer decks improve comfort and stability; many scooters house the battery inside the deck, which keeps the center of gravity low.
- Drum brake
- A brake with friction pads enclosed inside the wheel hub. Drum brakes are weather-resistant and nearly maintenance-free, but offer less peak stopping power than disc brakes.
- Disc brake
- A brake that squeezes a metal rotor with a caliper, like on cars and mountain bikes. Offers the strongest stopping power; can be mechanical (cable-actuated) or hydraulic (fluid-actuated, stronger and self-adjusting).
- Dual motor
- A scooter with a motor in each wheel. Dual motors roughly double acceleration and hill-climbing ability, at the cost of weight, price, and range. Standard on performance scooters.
- E-ABS
- Electronic anti-lock braking. Uses the motor to provide controlled regenerative braking force, reducing the chance of locking the wheel during hard stops.
- Folding mechanism
- The hinge that lets the stem fold down for carrying and storage. A quality folding mechanism has zero play when locked — stem wobble is one of the most common complaints on cheap scooters.
- Hub motor
- An electric motor built directly into the wheel, used by virtually all electric scooters. Brushless hub motors (BLDC) are quiet, sealed, and require no maintenance.
- IP rating
- Ingress Protection rating, e.g. IPX5 or IP54. The first digit rates dust protection, the second water. IPX4 handles splashes, IPX5 handles light rain, IP67 survives brief submersion. Most scooters are only splash-resistant. Riding in the rain →
- Kick-to-start
- A safety feature requiring the scooter to be moving (from a kick push) before the throttle engages. Prevents accidental launches from a standstill.
- LED display
- The handlebar screen showing speed, battery level, and riding mode. Better displays are readable in direct sunlight and show battery voltage rather than just bars.
- Motor watts (nominal vs peak)
- Nominal watts is the power a motor sustains continuously; peak watts is a short burst maximum. Marketing often quotes peak. Compare scooters on nominal power: 250-350W suits flat commutes, 500W+ handles hills.
- Pneumatic tyres
- Air-filled tyres. They absorb bumps, grip better in the wet, and ride far more comfortably than solid tyres — but can puncture. Available as inner-tube or tubeless. Full tyre guide →
- Range
- Distance a scooter travels per charge. Manufacturer figures assume a light rider at low speed on flat ground; expect 70-80% of the claim in real riding. Range calculator →
- Regenerative braking
- Braking that uses the motor as a generator, feeding energy back into the battery while slowing the scooter. Adds a few percent of range and reduces brake pad wear, but is weaker than friction brakes.
- Ride modes
- Selectable power levels — typically Eco, Drive/Standard, and Sport. Lower modes cap speed and acceleration to stretch range; Sport unlocks full power at the cost of battery.
- Self-sealing tyres
- Pneumatic tyres pre-filled with sealant gel that automatically plugs small punctures. Combines most of the comfort of air tyres with much of the reliability of solids.
- Solid tyres
- Airless tyres made of solid or honeycomb rubber. They never puncture and need zero maintenance, but transmit far more vibration and grip worse in the wet.
- Stem
- The vertical tube connecting the handlebars to the front wheel. Stem stiffness is a key quality indicator — flex or wobble here makes a scooter feel unsafe at speed.
- Suspension
- Springs, rubber cartridges, or hydraulic dampers that absorb bumps. Meaningful on rough roads; unnecessary on smooth bike lanes if the scooter has large pneumatic tyres.
- Swappable battery
- A battery pack that can be removed and replaced by the rider. Allows charging indoors without carrying the scooter and doubles effective range with a spare pack.
- Throttle (thumb vs trigger vs twist)
- The control that applies motor power. Thumb throttles are most common; trigger (finger) throttles suit some hand positions better; twist grips work like a motorcycle. Purely a preference choice.
- Top speed governor
- Firmware limit on maximum speed, often set to comply with local law (15.5 mph in much of Europe, 20 mph in many US states). Some scooters allow unlocking where legal. How fast do scooters go? →
- Tubeless tyre
- A pneumatic tyre that seals directly against the rim without an inner tube, like modern car tyres. Fewer pinch flats and can run sealant, but harder to repair roadside.
- UL 2272
- A safety certification covering the entire electrical system of a scooter — battery, charger, and wiring — tested for fire and shock risk. Increasingly required by law in cities and for transit and building access.
- Voltage (V)
- The electrical pressure of the battery system: 36V is standard for commuters, 48V for mid-range, 52-72V for performance scooters. Higher voltage generally means stronger acceleration and better hill performance.
- Watt-hours (Wh)
- The true measure of battery energy capacity: voltage times amp-hours. Range scales almost linearly with watt-hours — a 900Wh scooter goes roughly twice as far as a 450Wh one at the same speed. What charging costs →