This is a succinct account of my experience with the cheap electronic power supply module from China, “DC-DC Module 5-A/7-W (ERPC0575DC) XL4015.” I have used quite a few over the years and have to say ...

This charger receives 12VDC supply input from the car battery through the in-dash cigar lighter socket, and gives powerful DC voltage output for energizing the connected laptop/notebook computer.