Buying Guides

The Best USB-C Chargers: What’s Safe and What’s Dangerous?

Kannon Yamada 30-11-2017

Looking for a USB-C What Is USB Type-C? Ah, the USB plug. It is as ubiquitous now as it is notorious for never being able to be plugged in right the first time. Read More charger? Beware! Most USB-C chargers sold on Amazon can damage your devices!


Fortunately, experts like Benson Leung and Nathan-K, and websites like GTrusted, list tested USB-C chargers and cables in one location. Leung and Nathan-K collaborated on a spreadsheet containing a detailed analysis of a tremendous number of chargers and cables. The spreadsheet isn’t easy to read, so I’ve put together a list of their top recommendations along with some buying tips.

First, though, we need to explain why USB-C chargers can damage your gadgets.

Why USB-C Can Damage Your Devices

The biggest problem with USB-C chargers: manufacturers don’t perform proper testing and validation. It’s the same problem we saw back when dangerous USB-C cables How to Buy a USB-C Cable That Won't Destroy Your Devices A few months ago, Amazon banned USB-C cables that did not meet the standards set forth by the USB Implementers Forum (USB-IF), and for good reason: such cables are prone to failure, can damage connected... Read More set devices on fire.

Unlike 10-watt USB ports on older devices, USB-C can push 100-watts. A 10-fold increase in power dramatically ratchets up the potential for explosion and fire.

The Best USB-C Chargers: What's Safe and What's Dangerous? lumsing usb c charger


If you just want a list of safe USB-C chargers, skip to the section “What Are the Best USB-C Chargers?” below. If you want an explanation of the spreadsheet, and some of the flaws that can damage your devices, continue reading.

USB-C Charger Problems

Before reading further, you need to understand the reasons why Leung and Nathan-K rated some chargers poorly:

In addition to the above points, there are a few other important charger features that you should be aware of.

Quick Charge 3.0, Turbo, and Auto

Quick Charge 3.0, Turbo, Rapid: Modern battery manufacturers throw additional features onto chargers, such as “Rapid Charging” or “Turbo Charging” (such as Motorola’s USB-C Turbo Charger). Don’t be fooled. The majority of second party charging technologies aren’t proprietary. Both Turbo and Rapid charging are versions of Qualcomm’s Quick Charge specification What's a Quick Charger? Here's Why You Need One Now Smartphones take less time to charge up these days and it's all thanks to a new technology called Quick Charge. If you don't have it yet, you'll want it soon. Read More , which comes built into newer Snapdragon processors. Phones manufactured in 2014 or later likely offer Quick Charge. The standard is reverse-compatible, meaning a Quick Charge 1.0 charger will work with a 3.0 phone and vice-versa. The slowest link in the chain bottlenecks power transfer speeds.
Motorola TurboPower 30 USB-C / Type C Fast Charger - SPN5912A (Retail Packaging) for Moto Z Force Motorola TurboPower 30 USB-C / Type C Fast Charger - SPN5912A (Retail Packaging) for Moto Z Force Buy Now On Amazon $19.99


Motorola Turbo Power Charger USB-C
Image Credit: Lumsing 48-Watt USB-C charger via Amazon

Auto: USB-A ports (the rectangular plugs) on most chargers deliver an “optimized” combination of voltage and amperage. A USB-A port (with auto) automatically senses how fast a device can charge and supplies an optimized amount of power. There’s nothing special about this feature, and despite branding attempts, most implementations function identically to one another. More or less, you can ignore the marketing gimmicks as they relate to USB-A ports.

USB Type-C Power Delivery

USB-C (revision 2) transfers power using a standard called Power Delivery USB PD Explained: How Power Delivery Chargers Work USB Power Delivery (USB PD) is technology that makes charging faster using a USB Type C cable. But how does USB PD work? Read More . When you connect a charger to a smartphone, both devices negotiate a power transfer which varies in amperage and voltage. Most chargers can deliver one to six different combinations — multiplying amperage and voltage together equals wattage. For example, if a charger uses 5 V at 3 amps, it’s pushing 15 watts. If it’s using 15 V at 3 amps, that’s 45 watts to your device.

When picking a charger for a device, you just need to know the maximum voltage and amperage it can use. Pictured below, you’ll see an adapter for an Acer Switch Alpha 12 Acer Switch Alpha 12 Hybrid Tablet Review Looking for a better priced Surface Pro 4? The $600 Acer Switch Alpha 12 offers 90% of a Surface Pro, at almost half the cost. Read More that outputs 19 volts at 2.37 amps. That equals 45 watts. If you grab a charger from Amazon that maxes out at 5 V and 3 amps, it may not even charge your device. If it does work, it will deliver power at below the maximum wattage, meaning more slowly.


AC Adapter Amperage Voltage Wattage

For those curious, you can perform the same calculations at

Out-of-Spec Power Delivery

Unfortunately, some of the chargers output out-of-spec (dangerous) Power Data Objects. On the spreadsheet, if a specific voltage/amperage combination fails testing, Leung and Nathan-K mark it as bad (=BAD!). For example, Apple uses an out-of-spec PDO (14.5V @ 2A). And many third-party charger manufacturers include this profile, without properly testing it.

The out-of-spec 14.5V @ 2A PDO isn’t always a sign that a charger will burst into flames. However, it does suggest that the device wasn’t properly tested.


USB-C Charging Over PDO

Amazon’s USB-C Chargers That Don’t Comply

The problems arise when chargers do not comply with the USB-C Power Delivery specification. Shockingly, most chargers on Amazon do not fully comply with the USB-C specification. Here’s a list of the mediocre, bad, and potentially dangerous chargers tested by Leung and Nathan-K:

Bad USB-C Chargers

Out of the 30 devices tested, 16 are poorly designed pieces of junk (a zero means “decline to comment”). Five of these could potentially burn your house down. And while you’d expect similarly poor reviews on Amazon, the opposite is true. Even highly reviewed chargers pose a potential threat to your devices. For example, Aukey’s 60-watt 6-port charger [Broken Link Removed] scored a -3 from Leung. Yet its Amazon score strikes gold with a solid 4/5 stars. The reason should terrify buyers: many companies employ fake reviewers to fraudulently boost scores.

FakeSpot, a website specializing in detecting fake Amazon review scores, rates Aukey a D in overall honesty. The actual review score of the charger is around 1.5/5 stars.

FakeSpot USB-C

So with the dangers highlighted, what USB-C charger should you buy?

What Are the Best USB-C Chargers?

When looking for the best USB-C chargers, there’s one important question: Will the charger work without wrecking your gear? No one should play Russian roulette with their expensive electronics. And with the amount of fragmentation in the USB-C market, even the best chargers may not work properly with all your devices. With that in mind, here are the best USB-C chargers, as reviewed by Leung and Nathan-K.

Google 18W USB-C Power Adapter ($35)

The Google 18W USB-C charger outputs the lowest wattage of the three best-rated chargers. That means it can’t negotiate a high enough output to charge powerful tablets or laptops at max speeds. Overall, it’s a good fit for charging smartphones. Even so, there’s an off-chance that it may trickle-charge a few tablets or laptops. Keep in mind that even Google’s 18W charger won’t charge the Pixel Phone at its advertised 18 watts.

Google 18W USB-C Charger

Verizon USB Type-C Wall Charger ($40)

Verizon’s USB Type-C charger is the best option for those with Quick Charge 3.0 devices. It also includes the latest (and potentially out-of-spec) Quick Charge 3.0 rapid charging capability. What makes this unique among charging solutions is that it’s the only Quick Charge capable adapter to receive praise from Leung and Nathan-K. It also sells in packs of two, so you get double your money’s worth.

Verizon USB-C Wall Charger

Update: Benson Leung and Nathan-K recently downgraded the Verizon USB-C charger by a point. It’s still among the best USB-C chargers on the market — however, it violates the USB-C specification by combining Quick Charge and USB-C PDO into the same package.

Google Universal 22.5W Dual Port Charger ($40)

Regarded by Leung — and many others — as the best travel charger out of the bunch, the “Universal” (it’s not really universal) Google Dual Port charger offers a combination of decent wattage output, two steps of power delivery, and two modular, replaceable USB-C cables. For the price, it’s probably the best charger on the list, although it doesn’t charge a Google Pixel phone at its maximum wattage.

Google Dual Port USB-C Charger

What Are the Second Best USB-C Chargers?

Leung and company ranked a handful of chargers from Anker and dodocool slightly less highly than those from Google.

Anker 6-Port USB-C Charger

XINKSD Quick Charge 3.0 60W 6-Port USB Wall Charger, PowerPort+ 6 for Galaxy S9/S8/S7/S6/Edge/Plus, Note 5/4 and PowerIQ for iPhone XR/X/8/7/6s/Plus, iPad Pro, LG, Nexus, HTC and More (Black) XINKSD Quick Charge 3.0 60W 6-Port USB Wall Charger, PowerPort+ 6 for Galaxy S9/S8/S7/S6/Edge/Plus, Note 5/4 and PowerIQ for iPhone XR/X/8/7/6s/Plus, iPad Pro, LG, Nexus, HTC and More (Black) Buy Now On Amazon

For the money, the best charger is probably the Anker 60-watt USB-C charger — if you don’t need Quick Charge. Not only does the Anker output the correct voltage to power most USB-C laptops, but it also includes a large number of modular ports. You’ll need to, of course, purchase USB-C charging cables (which can cost quite a bit more than USB-A cables).

Anker’s 60-watt charger offers five modular USB-A ports, a single USB-C port, and the full range of voltages necessary to charge most USB-C devices — at their maximum rated charging speed. Unfortunately, despite appearances on paper as a truly universal charging solution, Anker’s charger suffers from a lack of D-/D+ encoding. Without legacy encoding, it can’t use Micro-USB or Lightning cables with an adapter for USB-C devices.

According to Leung, the 60-watt Anker suffers from a split PDO, meaning its power delivery isn’t within spec. A split PDO isn’t necessarily a deal-breaker — but it does result in quirky, sometimes unreliable, power delivery. Some users report that the Anker doesn’t quickly detect the optimal charge speed of a USB-C device.

dodocool 30-Watt USB-C Charger

dodocool USB C Charger 30W USB Type-C Wall Charger with Power Delivery Foldable Plug for Apple New MacBook, Chromebook Pixel, Nexus Pixel/5X and More dodocool USB C Charger 30W USB Type-C Wall Charger with Power Delivery Foldable Plug for Apple New MacBook, Chromebook Pixel, Nexus Pixel/5X and More Buy Now On Amazon

The dodocool 30-watt USB-C charger offers a no-frills 30-watt charging experience for USB-C devices. It features four different power delivery profiles, going all the way up to 20 V and 1.5 amps (which may work for some laptops). Nathan-K believes it to offer great per-dollar value.

On the downside, the dodocool only provides a single USB-C port and its included cable isn’t worth using. On top of that, it lacks legacy encoding, so it doesn’t work with older cables.

What’s the Best USB-C Power Bank?

The Kanex USB-C Power Bank

Without question, the best USB-C power bank is the Kanex USB-C power bank. Unfortunately, it runs for almost $100 on Amazon. While it does justify its pricing by offering both USB-A and USB-C charging ports, along with a whopping 15,000mAh capacity (which should charge most smartphones at least three or four times). It suffers from a maximum output of 15 watts, which makes it unsuitable for many laptops or higher powered devices.

I should also mention that if you’re a Pokemon Go player The Best Pokemon Go Power Banks Pokemon Go beats the heck out of a phone's battery. Squeezing a bit more Pokemon-catching juice out of your phone requires a power bank. But what's the best battery out there? Read More , the Kanex ranks toward the top.

Update July 2017: The spreadsheet received an update. Now, two other USB-C power banks are featured, both with scores of 2/3: the $120 Nomad and $50 RavPower.

What Are the Best USB-C Chargers for Cars?

Verizon TYPECPDVPC Car Charger

Verizon’s car charger received a score of 2/3 on account of questionable overload behavior. Most USB devices (usually hubs) automatically shut down when too many devices are connected. It’s not completely clear what Nathan-K meant — but one thing is certain: he only took off a point.

Otherwise, this is one of the two best USB-C chargers available for your car The Best USB Car Chargers for Your Next Road Trip Need a way to charge your smartphone on your next road trip? These awesome USB car chargers will help see you through. Read More .

Nomad Car Charger and Power Bank for USB-C [No Longer Available]

Rated a 2 by Nathan-K, this charger isn’t the fastest. However, I prefer it over the Verizon TYPECPDVPC charger because it’s more fully featured. In addition to providing two USB-C charging ports, Nomad’s hybrid charger also includes a 3,000mAh power bank battery.

Unfortunately, it’s completely out of stock online. I can’t even find it on eBay.

When you do buy a USB-C charger for your car 4 Mistakes to Avoid When Buying a USB Car Charger Your phone is valuable, but not all smartphone chargers are safe. Here's why you should avoid charging your phone in the car. Read More , avoid these mistakes:

What Are the Best USB-C Chargers?

If you’re looking for one of the best USB-C chargers, any one of the top three should meet your needs. Unfortunately, right now there’s a big issue with USB-C chargers. Third party devices are dangerous. On top of that, they’re not guaranteed to even work with your device. And if they do, they rarely charge a smartphone at its maximum charging speed.

As of the end of 2017, zero USB-C chargers offer everything you need. If you want modular cables, Quick Charge, Power Delivery, and for it to work with all your devices, there are no options out there. However, if you’re willing to compromise, thanks to Leung and Nathan-K, you at least have a few safe options.

What’s the Future of USB-C Chargers? GaNFast

As of 2019, a new and ground-breaking technology stands a chance of revolutionizing the charging industry: GaNFast USB-C chargers USB-C Chargers Just Got Amazing: Meet GaNFast Charging Read More . Navitas Semiconductor invented a new way of building the integrated circuits that go into laptop chargers and computer power supplies based on a material called gallium nitride (GaN). GaN-based chargers are 30 to 40% smaller than regular chargers while offering both Quick Charge and Power Delivery compatibility.

As of January of 2019, only two GaN chargers are widely available: the RAVPower 45-watt USB-C charger and the Innergie (Delta) 60C USB-C charger. Of the two, Innergie’s charger has received fairly good reviews (one reviewer found it equaled the stock Mac charger) and it passes basic safety tests. Unfortunately, the price is extremely high as of January of 2019.

Originally published in October of 2016.

Related topics: Buying Tips, USB.

Affiliate Disclosure: By buying the products we recommend, you help keep the site alive. Read more.

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  1. Jestre
    February 26, 2019 at 3:50 pm

    Is there a 4+ port charger/hub where all the ports or at least more than 3 are type 'C' with PD? Had found one without the hub portion but it appears to no longer be available and was >$200.

    • Kannon Yamada
      February 26, 2019 at 9:14 pm

      There shouldn't be anything like that as the technology for smaller transistors (gallium nitride) only recently entered the market.

      Four USB-C PD ports could in theory output 400-watts, which would require a massive brick. Even with gallium nitride, it may be difficult coming out with a portable charger that can output that kind of wattage. I don't see anything like that being released except for maybe enterprise-class applications. And to my knowledge, nothing like that exists.

      Can I ask what kinds of devices you're looking to charge?

      • Jestre
        October 23, 2019 at 3:03 pm

        Laptops, battery pack, 3 large phones, controllers.
        Basically here would be my dream device.

        REQUEST: USB-PD type-C adapter/charger/hub.
        Multiple Port, Powered, Charging USB hub, (>=3) USB type 'C' with PD charging on all 3+ type 'C' PD outlet ports, and integrated AC power supply.
        Ideal solution would be a >=100W load balancing integrated supply with at least 6 type-C outlet ports that can also act as a hub/switch.
        Currently have 9 type-C devices, 4 of which pull > the 15W profile on PD and 1 hits the 60W mark and another takes the full 100W, total max load for 5 of the devices hits >210W hence the need for intelligent load balancing.
        You could add 1 USB Type A for backward compatibility but no more than 2.
        Specifically an internal AC inlet supply (universal 90-250VAC) preferred.

  2. collin
    December 14, 2018 at 10:51 am

    The information provided contains some serious faults regarding the nature of power, voltage and current. I fully agree with the warning against cheap cables and chargers but the rest needs editing.
    The danger of cheap chargers emanates from the extreme bad electric design and more than extreme bad soldering.

  3. Brian Miller
    February 26, 2018 at 12:44 am

    It certainly took some time to sift through the data and it most definitely took a long time to analyze all of these chargers. This is such an important issue, from a safety and quality standpoint, that it should really be getting more attention. Thanks to all who were involved with performing the analysis and compiling the information!

  4. Andy Jenkinson
    February 12, 2018 at 10:03 pm

    The lead photo is of the Lumsing charger but it does not appear in the list. Does its placement in the article mean that it is a safe one or has it not been tested?

    • Kannon Y
      February 12, 2018 at 10:17 pm

      That is a generic stock photo. That charger outputs a v/a combination that breaks the USB-C charger specification, according to Nathan-K. It's probably not a safe bet. I should remove that caption before someone goes out and buys one.

      • Andy Jenkinson
        February 13, 2018 at 2:47 am

        Thanks for the swift reply. My LeEco Le Pro 3 is certified compliant according to the list but the charger that came with it is 12V 2A which presumably isn't. How can I find out if I need to charge at 12V 1.5A or 14.5V 2A?

        • Kannon Yamada
          February 13, 2018 at 3:50 am

          The USB-C specification is really neat. It can detect what level the battery is at while it's charging. So when it's nearly depleted it charges at its fastest speed and it steps down the speed at which it charges as the battery fills. So, to answer your question, it automatically senses what it's supposed to charge at. The more watts, the faster it charges.

          The problem is that some chargers (and devices) do a bad job of negotiating a specific voltage/amperage combination. And sometimes they output something that's outside what's safe for the device it's charging.

          To clarify, it's common for USB-C chargers to not work at all with some devices. And it's even more common for your device to not be able to charge at the different PDO that's available to it because either the charger doesn't support it, or the charger and/or device haven't implemented the specification properly.

          I have an Innergie 45-watt charger, by the way. It charges all my USB-C devices, although it does not charge my laptop at its maximum speed (which is fairly trivial).

      • Andy Jenkinson
        February 13, 2018 at 2:55 am

        I'm thoroughly confused now. Just noticed that under Out-of-Spec Power Delivery in the above article it talks about WATTS and amps not VOLTS and amps. Is that a mistake?

        • Kannon Yamada
          February 13, 2018 at 3:29 am

          Hey Andy, thanks a bunch, that was an error. I wrote watts instead of volts! It's corrected, thank you!

        • Andy Jenkinson
          February 13, 2018 at 1:18 pm

          Hi Kannon and thanks again. There should be a way to remove posts after you've made the correction? You mention you use an Innergie 45W charger. Do you not have any QC devices or does QC only kick in between a QC charger and QC device? I doubt that the power supply supplied with my Chuwi Hi13 has QC. It is a Keyu which states the output is 12V around 2 amp. I cannot see what the BATTERY needs. As devices are supposed to only request the power they need should I go for QC at 12V 1.2 A or non-QC at 14.5V 2A? Sorry to trouble you over this but it appears that the wrong choice can prove expensive.
          Thanks for a great article.

        • Kannon Yamada
          July 10, 2018 at 3:56 pm

          It looks like my last reply got lost. To answer your second comment, we do not have a way to remove posts unless I remove them personally, although they are working on a fix for this issue.

          I do have a few QC devices, but QC and USB-C to USB-C charging is not within the USB-C PD specification. QC is a Qualcomm-only feature whereas PD is part of the USB-C spec. The Chuwi Hi13 has an Intel SoC which supports USB-C PD IIRC. My understanding of this situation is that if you are looking for a single USB-C charger to power all your devices, it can't do QC on the same USB-C port that has PD. If it has a separate port that does QC, then it in theory is OK, but as Nathan-K pointed out, you can't combine QC and PD on the same port because QC breaks the USB-C specification.

          Basically USB-C is a mess!

    • Kannon Y
      February 13, 2018 at 6:35 pm

      I no longer buy QC devices. Quick Charge shouldn't be used on any USB-C device. QC is Qualcomm's technology and isn't part of the USB-C specification. If a USB-C port (USB-A is fine) uses QC and PD then it's out-of-spec. I'm not sure how it's implemented, though you'll notice on the spreadsheet that the Verizon charger received a score of 2 because it combines both QC and PD onto the USB-C port. That doesn't mean it's dangerous, but it's not good. There are plans to allow for better safety between QC, PD, and USB-C, but I haven't heard of anything regarding this in 2018.

      I've read that if a port outputs both PD and QC, there's a chance that the wrong v/a combo could be negotiated during handshake (because it hasn't been properly tested) which could cause damage or even a fire. They're SUPPOSED to be separate standards. So that means, yes, if you plug a charger that does PD and QC into a QC only device, it will probably negotiate a profile for a QC device. But you won't know for sure unless you're measuring it. Which is why it's better to make sure the device has been properly validated.

      I'm not certain in the slightest, but a properly validated PD-only charger will probably output the USB-A voltage (which is like 20-watts) rather than a QC v/a.

      Regarding the Chuwi Hi13, AFAIK, It doesn't. QC is native to Qualcomm processors. The Chuwi probably has an Apollo Lake CPU which might mean it has PD. But knowing Chuwi, they may have not properly implemented PD. Great value, but they tend to skimp on the trimmings.

      No need to apologize, I'm super happy to talk about this. Go for the non-QC. QC is only available for Qualcomm processors anyway. It's weird that they haven't published the charging specs for that device.

      • Bignamehere
        August 13, 2018 at 7:39 pm

        So are you saying an Anker product like this is not safe to use?

        PowerPort II with Power Delivery:

      • bignamhere
        August 13, 2018 at 7:46 pm

        So does that mean an Anker product like the PowerPort II with Power Delivery isn't safe to use? It has PD and IQ2 (QC?) and from what I can tell from this article and your above comment, it isn't safe.

        • Kannon Yamada
          August 30, 2018 at 4:06 pm

          Breaking the USB-C PD spec isn't automatically a sign that a device is dangerous. The charger needs to go through independent evaluation before one can say whether or not it's dangerous. However, as a consumer, you shouldn't even bother with anything that could be dangerous when there are tested chargers out there.

          Anyway, the question is whether or not it output PD and QC over the same port. If it does both on the same USB-C port, then you know it breaks the specification.

  5. Christopher
    December 7, 2017 at 9:21 pm

    (Sorry if this ends up a double-post, browser issues.)

    You mention in the article that 15v at 3a is dangerous as it's not conformant to the PD spec, but Texas Instruments seems to think it is:

    "Sources offering more than 27W shall advertise 5V, 9V and 15V.
    Sources offering more than 45W shall advertise 5V, 9V, 15V and 20V."

    The computer I purchased has the following power input specs:
    5 V dc @ 2 A / 12 V dc @ 3 A /15 V dc @ 3 A – 45 W USB-C
    5 V dc @ 3 A / 9 V dc @ 3 A / 10 V dc @ 3.75 A / 12 V dc @ 3.75 A / 15 V dc @ 3 A / 20 V dc @ 2.25 A
    – 45 W USB-C

    Since it supports 15v @ 3a, do you see any potential harm here? Can you expand a little on what the potential for danger is - perhaps danger for computers/devices that don't support that combo of volts/amps?

    • Kannon Yamada
      December 9, 2017 at 6:22 pm

      Hi Chris, I can't find that in the article. There are two common non-compliant features, to my knowledge. The first is combining both Quick Charge and USB-C PD on the same output. The second most common one is using one of Apple's custom USB-C charging profiles (I can't remember what amperage and voltage that is).

      Nathan-K said that where there's smoke there's fire. When a non-compliant power delivery object exists, there might be other problems. He seems to be right about this.

    • Kannon Yamada
      December 9, 2017 at 10:00 pm

      I found the section you are talking about Chris, sorry for the confusion.

      I screwed up. 15v @ 3a IS part of the USB-C specification! Benson and Nathan updated the spreadsheet and I failed to make a note (but will soon). They clarified that those marked as "BAD" suffer from Split PDO. That happens when a charger can't successfully negotiate a particular profile so it kind of stutters and splits between two different v/a combinations. They said it's not a deal-breaker either, as it only causes a delay in how long it takes for a device to choose a voltage/amperage combination before charging.

      Here's a great article on why a bad profile can cause fires:

      I think what happens is that a charger and device can negotiate a charging profile that's outside the range of what's safe. If they stay within the range of "safe" values as described by the USB-C specification, there's no chance of fire because it has already been rigorously tested.

  6. Amy Escobar
    November 28, 2017 at 8:49 am

    Wait just a second, why do you state that the Google 18w charger wont let the Pixel charge at 18w? Benson's sheet says it would let the XL do that, so why not the original Pixel?
    Btw, this website continually lags for me. And the text box keeps losing my cursor...

    • Kannon Yamada
      November 28, 2017 at 2:24 pm

      That's right. Benson's sheet is for the Pixel XL, not for the Pixel. The Pixel only charges at 15w (something like 7.5v and 2a). The Pixel XL charges at 18w. That's according to Leung. I only tested the XL.

  7. Ray
    September 26, 2017 at 4:28 am

    I wanted a charger that I could use to power both my 15" Macbook Pro and Nintendo Switch at the same time. The macbook is about 87W and the Switch about 39W. Am I dreaming that there may one day be a charger that can handle that?

    Also, if two devices are plugged in and exceed the maximum wattage, how does it negotiate what wattage to use for each?

    • Kannon Yamada
      November 28, 2017 at 5:15 pm

      87 watts for a laptop is an unbelieveable amount of power for a portable unit. No matter what device you buy, this is going to be a fairly large brick. Your best bet for safety is the official $80 charger from Apple.

      I cannot fully answer your second question, but I do know that the USB-C spec will try to evenly output to two different devices. However, most devices have a range of PDO values and so it will split output between them, but only to certain stepping points along the acceptable v/a range for that particular device.

  8. Miguel Gandara
    June 23, 2017 at 10:26 am

    The spreadsheet is updated?

    • Kannon Yamada
      June 23, 2017 at 4:47 pm

      Yes, the spreadsheet is semi-updated. Whenever new chargers are tested, they update it.

      • Miguel Gandara
        June 23, 2017 at 6:03 pm

        They update where? They publish somewhere?

        • Kannon Y
          June 23, 2017 at 6:19 pm

          The best place to find stuff online is Otherwise, you will want to follow Nathan-K and Benson Leung on their Google+ profiles. They have a lot of content there.

  9. Miguel Gandara
    June 23, 2017 at 10:25 am

    The spreadsheet from Leung and Nathan is updated? JUNE 2017

  10. snakeoil salesperson
    March 1, 2017 at 2:54 am

    I was actually at CES this year in Vegas and had the chance to check out a ton of awesome producs, I'm super excited about Samsung new 2017 tablets I'm always up on all the newest hottest tech stuff that is coming out! Thanks for the read and the comment! I look forward to your next article.


  11. Adam
    February 2, 2017 at 1:03 pm

    "I believe this may be a typo. Otherwise, it should receive a much lower rating."

    You've achieved a high google ranking with this article -- would be worth getting the complete information. Can you please confirm this with the authors?

    • Kannon Yamada
      February 2, 2017 at 1:17 pm

      Thanks for the comment Adam. I'll update the article shortly.

      Split PDO is not a part of the USB-C specification. It's basically a minor fault that causes a delay from when you begin charging and when your device receives its rated charge. The typo turned out to be the Verizon charger, which was downgraded to a rating of 2 (and that's because Qualcomm's Quick Charge isn't compatible with the USB-C specification. Basically, PDO and QC are two different specs and a single port can't do both unless it violates the USB-C specification.

      • Adam
        February 2, 2017 at 10:42 pm

        Thanks, Kannon! Congrats on the successful article.

  12. JM
    January 21, 2017 at 5:43 pm

    Will any car charger power the new 13 inch Macbook pro? Thanks!

    • Kannon
      January 26, 2017 at 10:04 am

      To my knowledge, the only car charger within the USB-C spec is listed on the spreadsheet toward the bottom. It received a 3 from Nathan-K and Leung, so it's top-tier. Whether or not it works with the MacBook is entirely unknown though. I've lately been ordering items from Amazon and returning them if they don't work. Sadly, I've found that most chargers don't work properly.

    • Nikolay F
      June 14, 2017 at 1:16 pm

      Hi JM,
      You can find a nice USB PD car charger on the US Amazon.
      Just search for "car charger power delivery". I would recommend the LinkOn one. It will charge the new MacBook 13" - this is verified.

      • Kannon Yamada
        June 14, 2017 at 2:38 pm

        This charger appears to output PD and Quick Charge over the same USB-C port, which makes it out of spec and potentially dangerous.

        • Nikolay F
          June 14, 2017 at 3:22 pm

          The charger has two separate ports for both standards.
          I agree that there are chargers delivering both standards through the same ports which is not compliant.

  13. Shaul
    November 30, 2016 at 3:20 pm

    how i find which chargers can function with 220volt 50hz ?
    It does not appear in the spec

    • Kannon Y
      November 30, 2016 at 7:15 pm

      I might be misunderstanding the question. European sockets are 220 volts, IIRC. That's what the draw from the wall, not what they output to devices.

      The output is standardized across devices, so you should be able to use a EU-to-US adapter or vice-versa if traveling without blowing a breaker or frying your device.