How to test charging circuit on HP elitebook 6930p

If the battery is older than 2 or 3 years, you may need to replace it.

And try these steps to reinstall the power management/charging software in the laptop.

Uninstalling and reinstalling power management software in Windows
In order to correct problems with the battery's power management software, follow the steps below.
1. Access the “Device Manager” .
2. Expand the Batteries category.
3. Under the Batteries category, right-click the Microsoft ACPI Compliant Control Method Battery listing, and select Uninstall .
WARNING: Do not remove the Microsoft AC Adapter driver or any other ACPI compliant driver.
4. On the Device Manager taskbar, click Scan for hardware changes .
Alternately, select Action > Scan for hardware changes .
Windows will scan your computer for hardware that doesn't have drivers installed, and will install the drivers needed to manage your battery's power. Restarting Windows will have the same effect of letting Windows re-recognize the hardware and installing the correct drivers.

If that doesn’t fix it, then shut down the computer, unplug all power cords, remove the battery, then depress the power button for 30 seconds. Replace the battery making sure all connections are solid, then plug in the power cord. Hopefully things are good.

Hope this helps.

Grif

The common laptop battery is a 300 cycle affair. So if someone used it daily on battery power you could see issues in 1 year. Even moderate use means issues at 2 years.

I'll read http://www.notebookcheck.net/Review-HP-EliteBook-6930p-Notebook.18233.0.html to get battery times. I see the range is 1hr 18min to nearly 6 hours for a new battery.

So if you get minutes on a charge it's 99 times out of 100 the battery is shot.
If the battery is years old, you change the battery.