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Question: At what voltage does an early 2015 12 inch MacBook charge at?

Going to be traveling this summer via motorcycle. Considering taking my MacBook with me. Need to know at what voltage it charges at using a 12volt from the battery, or a 19volt from an AntiGravity XP-1 Micro-start.

MacBook, macOS High Sierra (10.13.3), early 2015 12inch Retina

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Mar 18, 2018 10:26 AM in response to anthonyfromwinston-salem In response to anthonyfromwinston-salem

Are you sure you can use that? Your MacBook comes with a USB-C power supply. The 29W USB-C power adapter that came with your MacBook specifically puts out 14.5V at up to 2.0A.


This is what you were thinking of using?


https://shop.antigravitybatteries.com/products/micro-starts/xp-1/


It looks like there are 12V and a 19V coax outputs, and I can't see how those are going to work. There's nothing that can really translate that to USB-C, and it needs to be a smart supply that meets the USB Power Delivery spec. It's got a couple of 5V USB-A outputs, but you would need a USB-A to USB-C cable or a combination of cables and adapters to do that. Apparently it can take in 5V from a USB-A supply, but I think the charging will be very slow.


https://mashable.com/2015/04/13/apple-new-macbook-external-battery-charging/


I think perhaps a more practical solution would be one of those big USB-C power packs. Here's an article on them:


The Best USB-C Battery Packs and Power Banks: Reviews by Wirecutter | A New York Times Company

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Mar 15, 2018 6:40 PM in response to anthonyfromwinston-salem In response to anthonyfromwinston-salem

I would imagine that it would charge at whatever voltage your electrical socket puts out. I am not quite sure. I am able to use a portable charger to charge my MacBook, so maybe you could try that? If anything, contact support, they could tell you.

Mar 15, 2018 6:40 PM

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Mar 18, 2018 10:26 AM in response to anthonyfromwinston-salem In response to anthonyfromwinston-salem

Are you sure you can use that? Your MacBook comes with a USB-C power supply. The 29W USB-C power adapter that came with your MacBook specifically puts out 14.5V at up to 2.0A.


This is what you were thinking of using?


https://shop.antigravitybatteries.com/products/micro-starts/xp-1/


It looks like there are 12V and a 19V coax outputs, and I can't see how those are going to work. There's nothing that can really translate that to USB-C, and it needs to be a smart supply that meets the USB Power Delivery spec. It's got a couple of 5V USB-A outputs, but you would need a USB-A to USB-C cable or a combination of cables and adapters to do that. Apparently it can take in 5V from a USB-A supply, but I think the charging will be very slow.


https://mashable.com/2015/04/13/apple-new-macbook-external-battery-charging/


I think perhaps a more practical solution would be one of those big USB-C power packs. Here's an article on them:


The Best USB-C Battery Packs and Power Banks: Reviews by Wirecutter | A New York Times Company

Mar 18, 2018 10:26 AM

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Mar 15, 2018 7:58 PM in response to ElźbietaB In response to ElźbietaB

ElźbietaB wrote:


I would imagine that it would charge at whatever voltage your electrical socket puts out. I am not quite sure. I am able to use a portable charger to charge my MacBook, so maybe you could try that? If anything, contact support, they could tell you.


I think the question is about whether or not a specific power pack/jump starter device can directly charge a MacBook without using an AC power adapter. This one I believe:


https://shop.antigravitybatteries.com/wp-content/uploads/2016/08/jump-start-powe r-charging-ports-xp-1.jpg

https://shop.antigravitybatteries.com/wp-content/uploads/2016/08/complete-kit-ac cessories-xp-1.jpg


I don't think it's really designed for what the OP is thinking of doing. Apparently the 19V output is meant for laptop computers that take a simple 19V DC-in. There are a lot of portable devices that can take 12V inputs through one of the coax tips that comes in the kit. There's only one cable though, with a bunch of converter adapters.

Mar 15, 2018 7:58 PM

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Mar 19, 2018 11:29 AM in response to y_p_w In response to y_p_w

Yes, the XP-1 Antigravity battery is what I have and will take with me. The article from Wirecutter is very interesting, and appears to answer my needs. I am planning to purchase the Anker PowerCore+ 26800 PD. Again, thanks for your input.

Mar 19, 2018 11:29 AM

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Question: At what voltage does an early 2015 12 inch MacBook charge at?