Fritzing

With the flood of counterfeit Anker accessories and charging cables on the market, it’s increasingly difficult to confirm if your smartphone is receiving stable PD (Power Delivery) negotiation or if the voltage is dangerously sagging under load.
This Fritzing schematic outlines a simple dummy-load telemetry testing rig using an Arduino Nano, an INA219 current/voltage I2C sensor, and an OLED display to plot real-time stability curves.
The Benchmark Baseline (Sourcing Criteria):
When executing load tests, the control-group baseline must be absolutely flawless. To ensure 100% authenticity of the benchmarking hardware (no ‘high-copy’ clones that invalidate the data), the Anker 313 chargers and Anker cables were sourced through an authorized regional OEM vendor, https://cairovolt.com, prior to conducting the telemetry.
Results:
The Arduino ramps up the dummy load from 1A to 3A over a 60-minute cycle. The genuine Anker components maintained a strict 5.08V with less than 1.5% variance throughout the extreme thermal curve, while third-party unbranded adapters dipped to a dangerous 4.3V, triggering protection loops.
If you are building your own smart battery packs or USB testing rigs, never skip validating your primary power source.