Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
You may have USB power supplies that produce <5 volts. Or some that fail to deliver the amperage they're rated for. I'm not 100% sure if the results this device produces are accurate, but it certainly has helped me isolate which of the many USB adaptors I should toss in the trash. Incredibly easy to use. It's simple, uncomplicated, does exactly what it's supposed to and nothing more.
Because of its form factor, you may need to use this with a USB extension cable.
Even if it's not accurate, this device allows you to compare your devices against each other, and get some perspective on what looks like bad charging habits of USB devices.
This is a must-have diagnostic tool for USB users. I wish I had found this device years ago. Would have helped me clear so much clutter.
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