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June 6th, 2019 14:00

9570 won't charge via TB3

Thanks in advance for the help. 

I recently updated my XPS 15 9570 to BIOS 1.10. Before, I was on 1.7 and I typically used a 100W USB-C charger I got from HyperJuice on my machine. It use to work great for many months and would allow me to game on the laptop without draining the power. 

After I updated my bios the other day, I got a warning telling me that my 65W charger was not delivering enough power. I confirmed in the BIOS that the charger was indeed being "throttled" to 65W. 

Today, after working a bit at the coffee shop, my laptop was around 60% battery, when I plugged in the laptop to charge, I realised that it was not charging at all. Instead, I got a prompt saying that my charger is not powerful enough to charge the laptop.

I checked Dell Power Manager to make sure the AC charge feature was set to standard rather than trying to preserve battery health by limiting the charge cycle. I confirmed the same in the BIOS as well but none of these resolved the issue. I'm abroad and without my 130W barrel charger to test but am picking up a generic 90W charger to test tomorrow. My plan is to downgrade the BIOS back down to 1.7 which I was previously on to see if it fixes the issue. 

But does anyone else might have a solution to this problem? I'll report back with my findings after I pick up the new charger.

3 Posts

June 7th, 2019 05:00

So I managed to fix it. It looks like BIOS 1.10 no longer allows you to charge via a 65W charger anymore. I also realized the 9570 is not fully utilizing the extra power bandwidth my charger has. I downgraded back to BIOS 1.7 using dell's installer found on their support page for this laptop and all is working as normal again. Though I did have to purchase a backup charger to plug it in so it would install since I was below 50% battery.

1 Message

October 10th, 2019 12:00

Hi can you kindly share link where I can downgrade my BIOS from? I have similar problem now

1 Message

February 17th, 2020 08:00

I also bought the hyperjuice since DELL does not have a battery solution above 65W.  With the latest BIOS on my 5540 it doesn't recognize beyond 65W.  Sad, why can't dell allow superior technology to make its products more useful?

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14K Posts

February 17th, 2020 11:00

@Soul-786  go to support.dell.com, enter XPS 15 9570 in the search box, choose that model in the results, click Driver & Downloads, search "BIOS", and then expand the BIOS result and click "View older versions".

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