Car Charging (12V) a MacBook Pro intel i9
I'm trying to charge my MacBook Pro 16" (2019) which only has USB-C ports (no MagSafe). To do this in a car, I'm using a USB-C male to USB-A male connection, which plugs into a 12V DC connection directly with the car. The problem is that, when I do this, the battery does not show that it's charging. It doesn't even show the ever-unhelpful "Connected but not charging" status under the battery icon. I've tried it on the two ports on the left, and unfortunately I can't try it on the two on the right because the connector is only 6" or so and I'm on the right (passenger) side of the vehicle. I tested both polarities of the plug but nothing really changed.
I looked at a previous post where a guy was doing it with his boat and it couldn't work because of low wattage, but I have no way of retrieving the wattage for this particular car. I should have tried this connector with a wall outlet back at home to make sure it works, but hindsight is 20/20 😅.
In any case, is there a reason why my computer isn't charging? Do I just have a bad connector (these are some AAA insurance ones my grandma gave me, but they're brand-new usage-wise) or is it because of the car that the MacBook can't reach the 28 DC/100W that it needs so it can begin charging?
(I'm aware those are the specs from the M1 computers but I figure this probably also has USB Power Delivery Protocol or something similar, and so afaik these numbers are very close to it.)
Any insight would be gladly accepted.