Voltage (V): Measures electrical potential. Standard chargers are typically

5V5 cap V

5𝑉

, while fast chargers can range from

9V9 cap V

9𝑉

to

20V20 cap V

20𝑉

or higher to speed up charging.

Amperage (A): Measures the flow of electrical current. A higher amperage allows for faster charging, but the device will only draw the amount of current it is designed for.

Wattage (W): Represents the total power output. It's calculated by multiplying voltage by amperage (

W=V×Acap W equals cap V cross cap A

𝑊=𝑉×𝐴

).

• Example: A

  

  5V×1A5 cap V cross 1 cap A

  5𝑉×1𝐴

  charger is

  

  5W5 cap W

  5𝑊

  . A

  

  9V×2A9 cap V cross 2 cap A

  9𝑉×2𝐴

  charger is

  

  18W18 cap W

  18𝑊

  .

Charging Technology: Different protocols manage how the charger and device communicate to optimize charging speed.

• Standard: Basic protocols like USB Battery Charging 1.2.

• Fast: USB Power Delivery (PD) and Qualcomm's Quick Charge are common fast-charging technologies that allow for variable voltage and higher power delivery, notes this HONOR blog post.