Teardown and Standby Power Analysis of Belkin's Zero Standby Power 67W USB Charger

This video examines Belkin's BoostCharge Pro 67W USB charger, which is marketed as using zero standby power, and measures how much standby power it actually draws compared with chargers from Anker, CIO, UGREEN, and Apple. It also covers the charger's internal circuit design, its power conversion efficiency, thermal behavior, and the conditions under which the standby power figure changes.

■ Standby Power Measurements
- Test setup using a clean-sine-wave AC power supply and a power meter
- Measured standby power of the Belkin charger and several other brand chargers
- Annual electricity cost comparison based on Tokyo Electric Power rates
■ Efficiency and Thermal Performance
- Why power conversion efficiency matters more than standby power in daily use
- Conversion efficiency measurement and thermal camera readings
- Thermal throttling test under continuous maximum output
■ Standby Power With and Without a USB Cable
- Repeat measurements with a USB cable connected, including cables with and without an eMarker chip
- Comparison across other chargers when a cable is plugged in
■ Teardown and Circuit Analysis
- Internal structure, thermal compound, and graphite sheet placement
- Flyback converter architecture and the Renesas, Dialog, and Intersil components inside
- How the flyback controller and PD controller work together to reduce standby power

This content is suited to viewers interested in USB charger design, low-power electronics, or energy-saving hardware. Watching it provides a basis for evaluating charger standby power and efficiency figures, along with practical considerations when choosing and using a charger.