At TheWattLab, every product is analyzed using a rigorous, transparent protocol.
We buy every product with our own money. No manufacturer funds our analyses.
Every station goes through the same analyses to ensure reliable comparisons.
We evaluate in real-life use cases, not just in the lab.
We publish our raw data and explain every measurement.
We discharge each station from 100% to 0% with a calibrated constant load. Real capacity is often 5 to 15% below the manufacturer's specs.
We measure the actual maximum output on AC outlets, USB-C and DC ports with a precision wattmeter.
Charging time from 0 to 100% via mains, via solar panel (under measured sunlight conditions) and via car charger.
Performance at 0°C, 25°C (reference) and 40°C. LiFePO4 batteries can lose up to 20% capacity in extreme cold.
Measured in dB(A) at 1 metre, both idle and under load. Important for camping and sleeping.
Capacity tracking after 100, 500 and 1,000 cycles (when long-term analysis is possible).
Our proprietary score out of 100 that combines:
