The best chargers support their fastest rates on each port at the same time, with added devices slowing nothing down. Limited print with 100 copies authenticated and numbered pigment inks on hahnemhle rag 308g paper. Combined power output: After testing each individual port, we tested the combined output when each was pushed to the maximum.Then we repeated that test on each charger’s other ports, confirming that every port behaved as expected and that, combined, they matched the right output. We started with the power load set to 0 amps and then turned it up until it matched the promised amperage, ensuring the voltage stayed between 4.75 volts and 5.25 volts. This setup allowed us to finely control the power flow and determine whether it matched the advertised rate. Chargers with USB-A ports: We tested the maximum power draw from each port by plugging in a variable power load and an ammeter.We used the Total Phase USB Power Delivery Analyzer and its Data Center Software to measure and record this data, including the advertised power profiles, the steady state output, and whether any errors occurred in charging. Chargers with USB-C ports: USB-C uses digital communication between devices to verify charging speeds in a way that USB-A doesn’t with the right tools, you can interpret exactly what’s going on in the communication between the charger and the device you’ve plugged in.Funicular railway, cable railway, cable car isolated on white. ![]() ![]() outdoor travelling and alpine leisure activity background. Vector mountain ski or snowboarding resort lift with blue cabins.
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