Even though most laptops are 19v, some will charge the battery with 12v directly.
Key term is SOME. These are the laptops with charging circuits that are not fussy about the correct input voltage and probably have very little protection.
This is not ideal though because the amount of power consumed by the computer is likely more than it would charge by.
Charging with a designed 12v to 19v charger or using an inverter is a safer option.
USB-C charging is a great feature if your laptop has it.
Check out the Thinkware U1000 and the IROAD x10. Both are high quality dual channel dash cams with parking mode.Anyone know of a good dash cam? Rear cam?