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I have an HP laptop which I charge with a USB-C charger through the USB-C port. I have no idea which power delivery (PD) version it has and if it's PD-compliant at all. However, as the charging works, he-he, I assume it is.

On the HP website reference page about power delivery I read this:

Some 2015 or newer HP commercial notebooks can draw power from an external device such as an AC adapter, at different input voltages such as 5V, 9V, 10V, 12V, 15V, and 20V voltages. Not all voltages are supported on all models.

And the same voltages I recognize on my Baseus EU910 charger:

DC 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/3A, (60W max)

Can one check which voltage is used by the charger or consumer at the moment?

I inspected other questions on this topic: 1, 2, 3, but none of them exactly addresses my question.

I am aware that some kind of negotiation is held between the PD provider and the PD consumer, when they decide which voltage they will use for the current session. For me, it looks like pretty possible to get this information with some AIDA64-alike tool or programmatically via WMIC, etc. Is it?

Peter Mortensen
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Suncatcher
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3 Answers3

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You may try the Nirsoft BatteryInfoView:

BatteryInfoView is a small utility for laptops and netbook computers that displays the current status and information about your battery. The displayed battery information includes the battery name, manufacture name, serial number, manufacture date, power state (charging/discharging), current battery capacity, full charged capacity, voltage, charge/discharge rate, and more...

Knowing Nirsoft, this utility shows all the information known about the battery in Windows. Especially, the "charge/discharge rate" while the charger is connected might be the value that you're looking for.

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harrymc
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I use a USB-C breakout board and a voltmeter. If you have Windows though, harrymc's answer is easier.

USB-C Breakout from PMDWay, SKU 15182003

Peter Mortensen
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rsaxvc
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3

Sounds like you need a USB-C PD power (voltage and current) monitor, although it, rather unfortunately, has a USB-A output:

USB C Power Delivery Voltage Current Monitor and DC Output

A - Power input via USB C plug- connects to supply USB C socket such as power bank

A1 - Power input via USC C socket - connects to USB C cable from power supply

B - Status LED - lights when communcation of Power Delivery protocol is successful between monitor board and power supply under test

C - Digital display. Shows voltage when connected to power supply and no load connected; alternates between voltage and current when load connected at D

D - USB output - connect load here

E - voltage down - press to reduce power delivery test voltage

F - voltage up - press to increase power delivery test voltage

Simply connect to the USB C power supply or battery pack, then use the two buttons on the monitor to select the trigger voltage - 5, 9, 12, 15 or 20V DC. This tells the supply under test to up the voltage output which can be monitored using the numerical LED display.

Greenonline
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