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YOJOCK USB C Tester USB Power Meter 2 in 1 Digital Multimeter 3.6-32V 0-5.1A Voltage and Current Tester, Type C Voltmeter Battery Capacity Volt Ammeter Power Bank USB Cable Charger Detector: Amazon.com:
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Choosing USB Pin Voltages for iPhones and iPads « Adafruit Industries – Makers, hackers, artists, designers and engineers!
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