Bests & Worsts Reviews from Amazon

There were a lot of reviews/questions regarding if this product had a diode to prevent the car battery from draining. I performed an accurate test to verify this. Using a multimeter set to continuity measure, I tested the solar panel. By connecting the leads via the positive clip, the multimeter would be trying to power the solar panel. There was no continuity! When I connected the leads the other way (positive lead to the negative clip) there was continuity. This means that the solar panel has a diode that blocks in current coming from the positive clip (the same way a car battery would be trying to charge this thing). Then I moved onto the 12v socket connector. There is an LED and a resistor inside. THIS NEEDS TO BE CUT OUT/REMOVED. If this is left plugged in overnight, the car battery will be drained. With the resistor and LED removed, the 12v socket connector does not consume any electricity. I have yet to test this on a sunny day, so I do not know how much voltage/current it will output.