XPS 13 Plus 9320 - Sluggish Battery Life - revisiting

I own an XPS Plus 9320 that I purchased in 2023. Until recently, I have only used it occasionally at home, always plugged in as a home office PC. I’ve now started using it on the go for work and have encountered what seems to be a common issue ... extremely poor battery life.  Even in energy saver mode, I get no more than 2.5-3 hours of use, and under normal conditions, the battery drains in just about 2 hours. I contacted Dell support, and after a thorough two-hour session involving diagnostics, driver updates, BIOS updates and tweaks, and every tool they had at their disposal, there was unfortunately no improvement.

Despite the updates and BIOS changes intended to extend battery life, I’m still only getting around 2 hours of normal usage before the battery depletes completely. I’ve combed through every forum and resource I could find online, including this one, but nothing has resolved the issue.

If anyone has found a solution to this problem, I’d greatly appreciate the help. Is there a fix?  Thank you in advance for your feedback.