I have a HP Compaq 6515b laptop that I plan on using as a carputer. Its regular AC adapter outputs 19V, 90W, 4.74A. I want to run a DC-DC connection to power the laptop as well as have the laptop automatically power on / shutdown when the car is turned on/off. The laptop does support WOL, but the modem cannot be set to a specific port. I would be willing to hardwire to the power button. I have limited knowledge with custom wiring. I need to know what to buy and how the components should be connected. My main concerns are draining the car battery and frying the motherboard of the laptop. Any help would be greatly appreciated.
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