Volts: This is a measure between two points in an electrical circuit, sort of like the water pressure in pipes. The mains plug in your house has 240V (230V in UK, 110V in USA) and your motorcycle battery has 12V.
Amps: Together with the voltage, it determines the flow rate of the current. High amps with a low voltage means a lot of current flowing slowly, like a fat, lazy river. Low amps with a high voltage means a faster flow of less current, sort of like when you squeeze the end of a hose and the water spurts out.
Watts: It you multiply the volts by the amps you get the watts, which is the output power of the electric motor. You should already be familiar with kilowatts which are 1000 watts. One kilowatt is 1.34% of one horsepower or one horsepower is 0.75% of a kilowatt.
Kilowatt hours: This is the capacity of the battery. Think of how many litres you can fit in your fuel tank. A one watt-hour battery will power a 1W electric motor for one hour. The new Lightning Strike Carbon Edition has a 20kWh battery which means it can produce 1kW of power for 20 hours.
That’s just a start.
There are a lot of other factors involved and other terms for battery energy-density (watt-hours per kilogram), charging terms (AC, DC and fast chargers) and a variety of range calculations that take into regenerative charging.