Uploaded December 2025 | Updated September 2026, 1 week ago

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Testing and examining two USB phone chargers again. Probably the worst QC 3.0 quick charger so far compared to a small 5V 2A charger with a pleasant surprise inside. Quite an electric shock and fire hazard vs a usable product with decent safety features. A load test, what's inside, thermal imaging, and switching transformer autopsy with safety isolation analysis.

The thermal camera:
eu.topdon.com/products/tc002c-duo?ref=xisrleau&utm_source=affiliate

The USB tester:
fnirsi.com/products/fnb58?sca_ref=9216013.ntkg5GeG0R&utm_source=af&utm_medium=ref&utm_campaign=9216013

The internal resistance tester:
fnirsi.com/products/hrm-10?sca_ref=9216013.ntkg5GeG0R&utm_source=af&utm_medium=ref&utm_campaign=9216013

The 2-channel 180MHz oscilloscope:
fnirsi.com/products/dpox180h?sca_ref=9216013.ntkg5GeG0R&utm_source=af&utm_medium=ref&utm_campaign=9216013

My DIY test load:
danyk.cz/zatez2_en.html

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