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November 7th, 2019 11:00

Please remove 65W limit on third-party USB-C chargers

I've read in multiple locations and have just confirmed through my own testing that Dell systems that support charging via USB-C limit themselves to drawing 65W from non-Dell power sources, even when the power source can provide more wattage and the system would benefit from more power.  When I connect my Latitude 7480 to my Dell WD15 dock, the "Battery information" section of the BIOS identifies it as a 90W power source.  When I connect that same system to my Nekteck 90W USB-C charger, which is fully USB PD compliant and certified by both USB-IF and UL, my Latitude 7480 identifies it as a 65W power source -- even though multiple Lenovo systems I have correctly identify that charger as a 90W source.  Granted, the Latitude 7480 is only designed for a 65W power source anyway (although I believe it can take advantage of 90W for faster battery charging under heavy load if a 90W source is available), but then there are systems like the XPS 15 that are designed for a 130W power source.  Those systems also limit themselves to 65W from third-party USB-C power sources, even though they'll draw 130W from the Dell 130W USB-C charger or Dell docks that are designed to supply up to 130W.

The 65W cap on third-party power sources is a frustrating and seemingly arbitrary restriction, and is especially inconvenient with systems like the XPS 15 that are designed for high-wattage power sources.  I realize that using even a 90W power source with an XPS 15 might result in slower battery charging and/or performance throttling, but I might be fine with that on the road.  But if I have a 90W power source available and the system refuses to draw more than 65W, that makes the power deficit and therefore the side effects significantly worse.  Please stop limiting your systems this way.

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February 11th, 2020 04:00

jphughan, I have a Precision 7530, and can confirm this seems to be the behaviour.

I purchased a 90w non-Dell usb-c charger and it wouldn't charge at 90w.

However, I have also purchased what seems to be a genuine 90w Dell charger and it still didn't detect 90w.

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February 11th, 2020 05:00

@JimiScott  interesting data point. The 7530 is quite new, AND it’s designed to be able to accept its full 180W over a dual USB-C connection so that docks like the Dell WD19DC can fully power it. So I would have expected it would support Dell’s own 90W and 130W USB-C chargers. But maybe not. I remember people with the XPS 15 9550 and 9560 finding that after Dell later released the 130W USB-C charger later (for the XPS 15 9575 2-in-1), it wouldn’t work at 130W with those older models, even though those models DID accept 130W over USB-C through certain Dell docks. Disappointing to say the least.

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February 23rd, 2020 14:00

Wow this is so frustrating. What a bad move by Dell. Even Apple who limits everything doesn't have this kind of restriction. I hope Dell will change this with a firmware update. At least make them accept up to 100W, since that's the maximum for USB-C! Charging at 65W on a Dell XPS i7 Geforce gpu is like not charging at all. 

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April 16th, 2020 21:00

I am seeing the same behavior on my precision 5530 (based on XPS so not surprising).

130W charging through the dell dock, but limited to 65W through any other usb-c charger I have tried and I know they are capable of 100W as they do it on other devices.

Pretty disappointing to see dell limiting the port with non dell hardware for no apparent reason other than to sell dell accessories.

 

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June 29th, 2020 15:00

It seems that this may be changing, somewhat.  I'm seeing reports that the XPS 15 9500 and XPS 17 9700, both released in 2020, will allow up to 90W from third party USB-C power sources.  This finding was observed when using a 100W USB-C power source with a system designed for a 130W power source.  The XPS 15 9500 is only designed for a 90W source when equipped without an NVIDIA GPU.  XPS 15 configurations with an NVIDIA GPU, and all XPS 17 configurations, come with 130W power supplies.  So it seems Dell still hasn't completely lifted the restriction on third party charging, since otherwise these systems should be able to charge from third party sources up to the 100W max of the USB PD standard.  But 90W is better than 65W, I guess.

Here is a link to a thread where this was discussed in greater detail.

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November 29th, 2020 20:00

I am also unable to charge at full power with 3rd party chargers over USB C. The RavPower 90w charger negotiates to 90w on my XPS 15 9500, but only 65w on my Precision 5540. It would be great if Dell would issue a BIOS update to negotiate more common USB-PD configurations in these machines.

January 11th, 2021 01:00

What is the situation with Dell Latitude 15 5510? It supports 90W charging. I was planning to buy it and charge it with a third party compact travel USB-C adapter. Also was planning to buy a Dell monitor that charges it via USB-C. Which will work? I guess the Dell monitor should definitely work? But I won't buy it if third party compact chargers/adapters don't work. This is something Dell needs to fix/officially support before we buy their laptops. There is a reason the USB-C Power Delivery spec was created - it was to avoid proprietary expensive chargers.

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January 11th, 2021 06:00

@gauravkale  Haven’t seen anything either way about the Latitude 5510, unfortunately, so I’m not sure.

 

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January 21st, 2021 14:00

I've also run into this problem with the Vostro 15 7590 - bought a 100W USB-C charger online and the BIOS only shows it at 65W. Very frustrating and disappointing!!

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March 20th, 2021 06:00

Another vote from another user who bought a 100W USB-C (mine being from Monoprice, #41986, released ~2020 or 2021) explicitly for charging their XPS 15 (2019 XPS 15- 9570- GTX 1050Ti- i7-8750H). 

 

After double and triple checking my charger and cable, and using a wattage reader that never got above ~63w, I booted into bios to see what options I had. I was disappointed (like these other readers) that the system is recognizing it as a 65w charger and is likely a functional limiting the incoming charge. 

February 23rd, 2022 15:00

PLEASE!!! I have an Alienware M15r4 and the charger is absolutely gigantic. I bought a 96W USB-C charger as I also use the laptop at work so that i can avoid carrying the very heavy and large original charger. since I dont game at work 96W is more than enough for what i need. currently its only charging at 65W and this is just short of what i need. 96W would be more than enough to cover usage and even charge slowly. I also travel frequently for work and its really annoying carrying the giant charger.

if anyone knows how to hack this then let me know please!!

 

October 15th, 2022 11:00

Precision 5520 (similar to XPS 9560) suffers the same problem. 90W USB-C charger is only recognized as 65W with proper 100W charging cable and nothing else connected to the charger. Cannot run GPU without severe throttling using the 65W input, even though the battery is supposed to be able to provide the remainder of the power output. Please fix this in the next BIOS update - 90W would be a reasonable number given the hardware on this platform.

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October 15th, 2022 21:00

So any non dell powerbank does this including the sunjack?

 

https://sunjack.com/products/sunjack-100w-25600mah-power-bank?sscid=a1k6_45jyh

 

 

 

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December 13th, 2022 01:00

Facing the same issue;

Laptop: Latitude 3520

Hub type: Anker 341 USB-C hub 7 in 1

I tried connecting a USB-C 90W DELL AC Power adapter into this hub for PD but the laptop BIOS keeps giving me a notification that the power delivered is 50W! Considering Anker port is utilizing 15W, I understood that the power had been capped by DELL to 65W..

Is there a solution now? Did DELL send any BIOS update for this? This is a major setback limiting Customers to own only DELL accessories!!

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April 7th, 2023 08:00

I found this but it may not apply to AW: 

hackaday.com/2020/05/27/hacking-dell-laptops-to-use-off-brand-chargers

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