Power Delivery (PD) and other factors, such as the output current, length, and quality of the cable, affect the efficacy of USB charging. Calculating the necessary values to determine the best charger requires technical measurement and analysis, a task that may be arduous for the average consumer. Having a "good charger" in the home could quickly replenish a low battery, but why is one charger so efficient while another falls short?! 

This USB C to USB C Cable with 100W Watt Display allows you to visually determine the power supply setup. The USB C plug end displays the amount of power going into your device. Standard USB Type C PD power supplies offer up to 20V 5A for a maximum of 100 Watts -- ideal for charging phones and laptops quickly.

Optimize your charging needs by selecting the outlet or charger with the highest wattage number.

This cable can be used as a power monitor to test the current capacity of your single-board Linux computer or other high-current devices, or as a quick way to test the power delivery of your power supply.

It is 1 meter / approx 3 feet long, so it won't drag down your current but still gives enough length to reach any port.