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I want to power my arduino nano with my phone external battery charger. The problem is, when I connect them through a USB cable and turn on the battery charger, it works for serval seconds and then the battery charger turn off. I was surprised because I didn't think that the battery charger is smart enough to identify the device it connected to. Any ideas how I can bypass it?

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marked as duplicate by mkeith, Voltage Spike, Daniel Grillo, ThreePhaseEel, Dave Tweed Nov 29 '16 at 17:37

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  • \$\begingroup\$ did you tested voltage and current in whole time from start to shut down charger ? maybe your charger have internal defence from overcharging your battary!? a test for charged battery, and shutdowns when "feel" that connected device is charged !? and to bypass them, bout \$\endgroup\$ – Vladimir Ch Nov 28 '16 at 6:02