Batteries come in different voltages (V) and amp hours (ah).

Amp hours refers to the amount of electrical charge the battery can product in an hour, while voltage determines (in part) the power output of the battery.

Most e-bikes and e-scooters will have lithium-ion batteries.

The number of hours required to charge the battery fully when plugged into a 220v home socket. Among other things, charging time can be affected by temperature, battery age and health.

The motor is what provides assistance. The number of Watts produced by the motor (e.g. 250W), refers to the power output of the motor. The higher the wattage of the motor, the more powerful it is.
In the UK, the maximum legal power output of an e-bike for use on public roads and footpaths is 250W.

The maximum speed that an e-bike can go when pedalled.
In the UK, the legal speed limit of e-bikes is 15.5mph.

Battery electric motor torque is the rotational force generated by an electric motor powered by a battery.

The higher the torque, the easier it will feel when pedalling.

Anything over 30nm is more than sufficient!

The "Range" refers to the number of miles that the battery will assist you while you cycle.

The range of any e-bike or e-scooter is highly sensitive to the weight of the rider, style of riding, terrain traversed or level of assistance used, to name a few.

E-bikes generally use either a torque or cadence sensor.

Torque sensors measure the force applied to the pedal, adjusting assistance based on rider effort, while cadence sensors determine pedal rotation speed, regulating assistance independently of force on e-bikes.

Torque sensors are considered to be smoother than cadence sensors, adjusting to the rider's inputs.

Having gears, from a company such as Shimano, makes cycling up and over hills easier.
Cycling in a lower gear means less pedalling effort and less speed.
Cycling in a higher gear means more pedalling effort and more speed.

Most e-bikes will come with 7 or 8 gears.

The weight of the product (including the battery).

The size of the product when it is unfolded and ready to ride.

The size of the product when it is folded.

Hydraulic disk brakes on e-bikes use fluid pressure for actuation, providing smoother and more precise braking, while mechanical disk brakes use a cable system for actuation, offering a simpler design but potentially requiring more maintenance.

Having front suspension soaks up bumps (like potholes!) and makes for a smoother ride.

Tyres come in a variety of sizes and compounds.
Smoother tyres are better for the road, while tyres with a more pronounced tread are better for gravel or off-road riding.

The suitable height of the rider based on the product's frame and geometry.

IPX0: No special protection.

IPX1: Protected against dripping water for up to 10 minutes.

IPX2: Protected against vertically dripping water when the device is tilted at an angle up to 15 degrees.

IPX3: Protected against water spraying up to 60 degrees from vertical.

IPX4: Protected against splashing water from any direction.

IPX5: Protected against water jets at low pressure.

IPX6: Protected against powerful water jets.

IPX7: Can be submerged in up to 1 meter of water for 30 minutes.

IPX8: Can be submerged beyond 1 meter; the depth is specified by the manufacturer.

IPX9: Protected against high-pressure, high-temperature water jets.

The maximum weight the product can handle when ridden.

E-bikes and e-scooters have a display to show, among other things, the e-bike or e-scooter's projected range, level of assistance and total distance covered.

Displays can be black and white, colour, waterproof or non-waterproof.

Some e-bikes and e-scooters integrate with a a smart app. What each app does is dependent on the brand and model.

Lumens measure the total quantity of visible light emitted by a light source, indicating its brightness.