False “Slow Charger” warning when using ZBook X G1i with official 150W adapter and Thunderbolt monit

[MatjazOgrinc]

Details:
I am using an HP ZBook X G1i with the original 150W 4.5mm barrel power adapter connected, while also using a Thunderbolt 4 monitor (HP 738PU). Windows 11 24H2 consistently shows a “slow charger” warning.

This is misleading, because:

• The 150W adapter is connected and provides sufficient power.

• The warning is triggered by the monitor’s USB-C PD (which is below the required wattage), but the laptop is not actually charging slowly.

Impact:

• Causes confusion for users, especially in enterprise deployments.

• May lead IT teams to incorrectly suspect power issues.

Request:
Please update BIOS/firmware/HP Power Manager to suppress “slow charger” notifications when the official barrel adapter is detected, even if a secondary USB-C PD source is connected.

Thank you for considering this improvement.

[MatjazOgrinc · Accepted solution]

HP ZBook X G1i 16 inch Mobile Workstation PC IDS Base Model
Product number:
B4YT6AV

Installed new bios update 01.03.02 Rev.A released Sep 24, 2025. After update, no notification for slow charger. 

Bug resolved.

Regards, Matjaž

[Vjx]

Hello MatjazOgrinc ,

Thank you for reaching out. Regarding False “Slow Charger” warning when using ZBook X G1i with official 150W adapter and Thunderbolt issue you’re experiencing.

Kindly review the instructions as below :

- Were there any changes made to the hardware or software , windows updates or drivers update 

- Find all relevant guides and drivers from the support page here on best effort basis with the limited details that we have about the device  -

https://h20195.www2.hp.com/v2/GetDocument.aspx?docname=c09153573&jumpid=af_9597e24ffc

https://support.hp.com/gb-en/drivers/hp-zbook-x-g1i-16-inch-mobile-workstation-pc/2102844148

- Instructions for setup on best research possible  -

use HP Support Assistant 

https://ftp.hp.com/pub/softpaq/sp160001-160500/sp160330.exe

Also , update your BIOS/firmware

This will help us narrow down the cause and suggest the best fix

[MatjazOgrinc]

Hi Vjx

As I already wrote, the issue was resolved by upgrading BIOS to 01.03.02 Rev.A released Sep 24, 2025.

For additional info, simptoms before BIOS update...

Bought new HP ZBook X G1i 16 inch Mobile Workstation PC IDS Base Model Product number:B4YT6AV.

No hardware or software modifications, use Windows 11 which was preinstalled to computer. 

After I get computer I run Windows update, to get the latest Windows 11 updates, I also run HP Support assistant to get any driver updates. 

When I connect notebook to my Thunderbolt4 monitor HP 738PU and at the same time i had computer connected to original HP 150W supply which came with computer, In windows, I alwas get this notification for "slow charging".

But, as I already wrote, After BIOS update to 01.03.02 Rev.A, no more notification, computer know that there is 150W barrel 4,5mm supply and that has enough power. 

Regards, Matjaž