Review on 🚗 Waterproof Dual USB Car Power Outlet: Quick Charge 3.0 + LED Voltmeter - Black by Andrew Agarwal

I have two complaints... first... although it shouldn't be as it's only a small power consumer, it drains the car battery as much as possible. cause starting problems when connected to a constant current source. Tested 3 days in a row, car parked with 13.8 volts on battery... next morning it dropped to 12.3 volts. I unplugged the USB and the next morning the battery voltage was still 13.7 volts. Another annoying thing is the display of volts. At first I thought it was a useful feature, but driving it at night is very distracting. Well done but there are flaws.