The post always rings twice. I got a meter to measure voltage and amps during charging my MVP. It toggles between amps and voltage. The meter is hooked up to Anker 5 port USB charger. It has a build in male and female connectors. It is called the CHARGER Doctor.
Those things are handy and inexpensive depending on where you find them. Interesting to see how much current that MVP is actually drawing - really not something I would want to turn a lap top into a USB power supply for.
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