![]() In this example, the Portapow USB tester reads 5.14V at 0.62A. I was a little curious to see what kind of difference I’d see in current readings, so I plugged in a USB voltage/current tester in line with a device being charged under USB. The top USB shows 0.19A draw, and 0.26A for the bottom. I’ve plugged in two devices for charging. It’s not obvious by looking, but the USB ports are oriented so the label side is down, or pointed towards the LCD display end. The LCD turns off after a few moments if there’s no load attached. In this photo, no USB devices are plugged in. It’s a backlit inverse LCD (dark background, light lettering). ![]() Once you plug it in the power/mains outlet, the LCD display comes to life. ![]() Here you can clearly see there are two USB ports (not four). AC input is listed at 100-240V (50 or 60Hz) making it suitable for international travel.
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