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XPS 15 9570 USB C Charging Limits
Hi,
I've brought a Galio 120W charger from Baseus. Baseus claims that the Galio support 20V 5A PD outputs on USB C port with 5A E-mark line and my friends can charge MBP with it at 100W full power. But I can't use it to charge my XPS 15 9570 at a 100W power.
I find the power rate in BIOS is always 65W and can't beyond it.
I have been told that the EC will limit the charging power to 65W when the 3rd party USB C charger was plugged in. Is that true?
There are lots of 3rd party 100W USB C chargers come out in 2020. They are of cause passed the safety test like FCC UL ETL CCC and certificated by USB IF, why DELL limits the custom to choose only the DELL product? Apple can take the risk of customers using the 3rd party charger, why can't DELL?
jphughan
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June 4th, 2020 20:00
@dynamixyang Yes, my experience has been that Dell systems limit themselves to drawing no more than 65W over USB-C from non-Dell power sources, even if the source can provide more and the system would benefit from more, as is the case with the XPS 15. I wrote a thread about this here. I don't know why Dell does this either, and I hope it changes in the future, but at the moment this seems to be the case. It's especially bad on the XPS 15 because 65W is only half the wattage it's designed to have available, so using those chargers results in little to no battery charging and/or significantly throttled performance, especially when the GPU is active.
Making matters a bit worse, last time I checked, Dell's official 130W USB-C charger only seems to support 5V and 20V output, so despite its high wattage output, it isn't usable for fast charging devices that require 9V or 15V to fast charge.
dynamixyang
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June 4th, 2020 22:00
That's really frustrating.
The USB C PD protocol is designed to be good compatibility and open. The products of Apple, HP, Razer, etc. have full 100W PD support on their notebooks, why just dell can't have full support.
BTW, does the 130W USB C charger provides by Dell can charge XPS 15 9570 at a 130W power?
jphughan
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June 5th, 2020 08:00
@dynamixyang I believe Dell's 130W USB-C charger does work at 130W on the 9570. Dell created the 130W USB-C charger when they created the XPS 15 9575 2-in-1, which required 130W but didn't have a "traditional" charging connector. And even the XPS 15 9550 supports 130W over USB-C coming from certain Dell docks. Strangely, I do remember some reports that the early XPS 15 generations (9550 and maybe 9560) wouldn't accept 130W over Dell's USB-C charger even though they would from those Dell docks -- I guess the system and/or charger didn't recognize each other to enable the proprietary 130W mode? -- but I'm pretty sure I've seen confirmation that this is not an issue on the newer 9570.
WeWant100WattUSBPD
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November 17th, 2020 15:00
Dear Dell please add support for the USB-PD standard. This includes 100Watt charging.
Or please provide a technical reason why Dell laptops can't support 100W USB-PD sources.
jphughan
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June 4th, 2021 08:00
@Andybc That has been confirmed for the current XPS 15 9500, but the 9570 being discussed here is two generations older.
Andybc
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June 4th, 2021 08:00
There are definitely some chargers that support 90w charging for XPS products. Anything on top of it would be only dell's priority products.