You should be able to run Dell Support Assist to see the health of your battery. I think there might also be something in the BIOS to see the battery health as well, but it's been a while since I've looked there.
But yeah, if the Dell BIOS updater doesn't think the battery is charged, that could be a sign the battery has issues. However, my various Dell laptops over the years didn't develop battery issues after that short of a time.
Also, when you want to update the BIOS, make sure to right click on the file, and select run as an administer. I know it threw me off several years ago when I just double-clicked the file to run, and it kept popping up a weird message.
After I began right clicking the file and running it as an administrator, I've had no issues updating the BIOS on my Dell laptops.