Teardown of 140W MacBook Pro Power Adapter Shows What's Inside

The 140W power adapter that ships with the 16-inch MacBook Pro models is unique in multiple ways, with Apple introducing new technology in the charger. It is the first Apple power adapter using gallium nitride or "GaN" technology to cut down on size, and it is equipped with USB-C Power Delivery 3.1. ChargerLab today published a teardown of the 140W power adapter, giving those who are curious about what's inside a look under the hood.


The teardown video features general measurements and testing of the power adapter, but ChargerLab also completely disassembles the body to get to the internals. The analysis portion of the teardown is highly technical, but that bit, which starts at around 7:30 into the video, is worth watching for those who want to know about the specific chip setup Apple is using.

As mentioned up above, this is the first power adapter that Apple has introduced with USB-C Power Delivery 3.1, and it is also compatible with devices that support that charging specification. ‌MacBook Pro‌ models are also able to charge with USB Power Delivery 3.1 chargers from third-party brands.

The 140W power adapter ships with the 16-inch ‌MacBook Pro‌, and it is also available from Apple for $99.

Related Roundup: MacBook Pro
Buyer's Guide: MacBook Pro (Buy Now)
Related Forum: MacBook Pro

Popular Stories

Apple Wallet ID Illinois

Apple Plans to Expand iPhone Driver's Licenses to These 7 U.S. States

Wednesday December 24, 2025 8:40 am PST by
In select U.S. states, residents can add their driver's license or state ID to the Apple Wallet app on the iPhone and Apple Watch, and then use it to display proof of identity or age at select airports and businesses, and in select apps. The feature is currently available in 13 U.S. states and Puerto Rico, and it is expected to launch in at least seven more in the future. To set up the...
iPhone Top Left Hole Punch Face ID Feature Purple

iPhone 18 Pro Launching Next Year With These 12 New Features

Tuesday December 23, 2025 8:36 am PST by
While the iPhone 18 Pro and iPhone 18 Pro Max are not expected to launch for another nine months, there are already plenty of rumors about the devices. Below, we have recapped 12 features rumored for the iPhone 18 Pro models. The same overall design is expected, with 6.3-inch and 6.9-inch display sizes, and a "plateau" housing three rear cameras Under-screen Face ID Front camera in...
maxresdefault

Where's the New Apple TV?

Monday December 22, 2025 11:30 am PST by
Apple hasn't updated the Apple TV 4K since 2022, and 2025 was supposed to be the year that we got a refresh. There were rumors suggesting Apple would release the new Apple TV before the end of 2025, but it looks like that's not going to happen now. Subscribe to the MacRumors YouTube channel for more videos. Bloomberg's Mark Gurman said several times across 2024 and 2025 that Apple would...
iOS 26

iOS 26.2 Adds These 8 New Features to Your iPhone

Monday December 22, 2025 8:47 am PST by
Earlier this month, Apple released iOS 26.2, following more than a month of beta testing. It is a big update, with many new features and changes for iPhones. iOS 26.2 adds a Liquid Glass slider for the Lock Screen's clock, offline lyrics in Apple Music, and more. Below, we have highlighted a total of eight new features. Liquid Glass Slider on Lock Screen A new slider in the Lock...
iOS 26

iOS 26.3 Brings AirPods-Like Pairing to Third-Party Devices in EU Under DMA

Monday December 22, 2025 3:20 pm PST by
The European Commission today praised the interoperability changes that Apple is introducing in iOS 26.3, once again crediting the Digital Markets Act (DMA) with bringing "new opportunities" to European users and developers. The Digital Markets Act requires Apple to provide third-party accessories with the same capabilities and access to device features that Apple's own products get. In iOS...
maxresdefault

10 Mac Apps Worth Trying in 2026

Wednesday December 24, 2025 9:27 am PST by
2026 is almost upon us, and a new year is a good time to try out some new apps. We've rounded up 10 excellent Mac apps that are worth checking out. Subscribe to the MacRumors YouTube channel for more videos. Alt-Tab (Free) - Alt-Tab brings a Windows-style alt + tab thumbnail preview option to the Mac. You can see a full window preview of open apps and app windows. One Thing (Free) -...
iPhone Fold Vertical Feature

Why Apple's Foldable iPhone May Be Smaller Than Expected

Tuesday December 23, 2025 5:21 am PST by
Apple's first foldable iPhone, rumored for release next year, may turn out to be smaller than most people imagine, if a recent report is anything to go by. According to The Information, the outer display on the book-style device will measure just 5.3 inches – that's smaller than the 5.4-inch screen on the ‌iPhone‌ mini, a line Apple discontinued in 2022 due to poor sales. The report has led ...
Foldable iPhone 2023 Feature Iridescent Search

Samsung Developing 'Wide Fold' With iPhone Fold-Like Design Ahead of Apple's 2026 Launch

Tuesday December 23, 2025 11:55 am PST by
Samsung is working on a new foldable smartphone that's wider and shorter than the models that it's released before, according to Korean news site ETNews. The "Wide Fold" will compete with Apple's iPhone Fold that's set to launch in September 2026. Samsung's existing Galaxy Z Fold7 display is 6.5 inches when closed, and 8 inches when open, with a 21:9 aspect ratio when folded and a 20:18...
iphone fold 3d print

Have a 3D Printer? You Can Make Your Own iPhone Fold Dummy

Tuesday December 23, 2025 1:31 pm PST by
Apple is working on a foldable iPhone that's set to come out in September 2026, and rumors suggest that it will have a display that's around 5.4 inches when closed and 7.6 inches when open. Exact measurements vary based on rumors, but one 3D designer has created a mockup based on what we've heard so far. On MakerWorld, a user named Subsy has uploaded a 1:1 iPhone Fold replica (via Macworld), ...

Top Rated Comments

BuffyzDead Avatar
54 months ago
The Moral of this entry, Is:

Beware Of Chinese Knockoffs, OR Suffer, at your own doing
Score: 14 Votes (Like | Disagree)
TheYayAreaLiving ?️ Avatar
54 months ago
Dang! They ripped that thing apart. Highly advanced technology in that little adapter.

However, the adapter does get heated while charging your ?
Score: 9 Votes (Like | Disagree)
ToomeyND Avatar
54 months ago
Title writer took a day off. :)
Score: 8 Votes (Like | Disagree)
Reelmower Avatar
54 months ago
Kudos for proper use of unique. Most would have written “very unique” (incorrect), instead of “unique in many ways” (correct).
Score: 7 Votes (Like | Disagree)
jaytv111 Avatar
54 months ago

Does anyone know if the new MBP 16" Fast-charge capable with included 140W USB-C Power Adapter will 'fast charge' when coupled with Apple's power adapter extension, or will it revert to normal charging speed?

I still want to benefit from the 0 to 50 percent charge in around 30 minutes, but also want the added length of the 1.8-meter Power Adapter Extension Cable ('https://www.apple.com/shop/product/MK122LL/A/power-adapter-extension-cable?fnode=e4e0c67a842678974cd97ceb487b69d129d852354b10a4e7556577b2a319b6a99e611cd15fb812e10892cbb1189ed02bd0956869b824bbd97b9e59c7c03792d00d16bf493215752cba1bc27f25ade51b8a07d1068dd35b4d065ddd3c3e024a81').

Although Apple's site description says "Use it with MagSafe and MagSafe 2 power adapters, 10W and 12W USB-A power adapters and 29W, 30W, 61W, 67W, 87W, 96W, and 140W USB-C power adapters. ('https://www.apple.com/shop/product/MK122LL/A/power-adapter-extension-cable?fnode=47c196e1e77061c642eb8ac9977381fcb6d91b5f9152683b823d557991349d7123094ecfb29879eea8be901f2aaa02324b8cc7e2896380606f3dbbbb937a21bc913f8f89700eccfa6b090e87e38795c865ec34aacccb4f3d2632d107d556c38dfa2d9f7e9ad22ad4863f04b5fe4e8103')" The one that Apple just shipped me with my new MBP 16" 2021 box says... MagSafe 2 up to 87W. See Screenshot attached.

So...
[LIST=1]
* Did Apple send me the wrong power extension cable, is there another one compatible with MBP 16" 2021?
* Does the power extension cable work with MagSafe 3 / Fast-Charge and Apple just hasn't updating their specs on the actual box yet?

Thanks for help!


They don't have to change anything on the extension, it's the same extension. Since it's on the AC side of things, it actually doesn't change anything on the DC side (the actual cable you use to charge the device), it just has to be reasonably thick to handle the current (which it definitely is and the increased power barely makes a dent in that thick a cable on the AC side).

The magic of AC power is that the cables can be super long and handle a lot of power, but the disadvantage is that all AC needs to be converted to DC for electronics to work.
Score: 6 Votes (Like | Disagree)
Mick-Mac Avatar
54 months ago
That restriction is on lithium ion batteries (100VA) - the thing that contains the energy (and can blow up). A battery charger isn't the same thing as a battery.
Score: 6 Votes (Like | Disagree)