Sudden battery problem.

[Cross313]

My laptop battery used to last at least 4 hours, but after a win 10 clean install it dropped to 2 hours tops. Nothing is running in the back, and basically nothing changed.
Before the reinstall it worked perfectly, and I could actually use it for 4 hours.

Could this mean a dead battery?

HP Zbook 15 G2

 

[R_1]

try another OS and see if windows 10 is the issue.
easiest way is a thumb drive with linux on it. it will leave the installed OS intact and untouched.

Boot to a USB drive with linux on it. grab a USB drive, a copy of rufus and a linux distribution.
http://distrowatch.com/ has tons of differing linux distributions and download links. I personally am fond of linux mint with cinnamon.
https://rufus.akeo.ie/ the utility used to extract the ISO file to the USB drive.

use rufus to extract the selected ISO to the tunmb drive. it will make the drive bootable and you can run linux from the drive once done.
Reboot into linux and proceed to test the hardware. connect to internet, watch videos, await problems.
if linux is good and stable the issue is most likely inside windows or otherwise software related.
this is a test of the hardware.