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.

Posted on Nov 26, 2023 2:47 PM

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Nov 26, 2023 6:20 PM in response to Ananimouse

Both our Toyotas have DC/AC inverter functions built in. They are rated at 100W, more than enough to charge many MacBook Pros using the regular chargers of 100W or less.


Check your owners manual. If this is NOT a feature of your vehicle, you must have an aftermarket inverter to turn 12VDC to 110VAC that plugs into the 12V port on your car dashboard.. Example:


https://eshop.macsales.com/item/CyberPower/CPS240PAUR/


Make sure any such device says approved for computers.

Nov 26, 2023 3:20 PM in response to Ananimouse

Ananimouse wrote:

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.


I hardly doubt this would be enough to power the Mac.

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Car Charging (12V) a MacBook Pro intel i9

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