Electrical
Motor
E-bikes use brushless DC motors, or BLDC motors, meaning they don't use brushes to alternate the direction of current flowing to the motor, as older electric motors did. Those brushes made the motors less efficient and tended to wear out over time, so brushless motors have been the standard for more than a decade.
Battery
The battery is one of the most important components of any e-bike, as well as the most expensive. The battery is the deciding factor in how long the bike can be used without recharging, how long it will work, how much it weighs etc. In general, when you choose an electric bike, the battery is the component that you must pay the most attention to.
Display
The E-Bike Display is used to control your E-bike, but also functions as a cycle computer. Most E-bikes Displays often offer the option, aside from setting the level of support, to read all kinds of information from the display, like your battery level and speed. With a display you get a personal cycle computer for your e-bike.
Throttle
If your ebike has a handlebar throttle, that allows the motor to run without pedaling, power consumption is much greater. It's important to understand how your ebike works, a 500w kit does not use exactly 500w, all of the time. If you pedal without using power, your battery remains fully charged until you use it.
DC Converter
A DC-DC converter is the best way to tap into your large ebike battery pack in order to power auxiliary devices, from 3rd party bike lights to cell phones to GPS units. The 5V6V/12V 2A converters are supplied with their output lead terminated with an inline 5.5 x 2.1mm DC power plug.
Controller
As soon as you pull the throttle or start pedalling on a pedal assist model, an electrical switch is connected that creates a full circuit in which electricity can flow, telling the controller to then connect the circuit from the battery to the motor, and the LCD screen if your e-bike has one.