The G5 is a few years old at this point. While it’s unheard of for batteries to fail as I have two (i7-8550U/4K and a i7-8650U/SV deleted one) with original batteries, it happens but not as often as say, a G1-3 which are much older. I also have one I got for parts thinking it had a BIOS password and ended up repairing (it didn’t, so I threw a screen assembly on as it was an SV model before I yeeted that option— i5-8250U variant). The first thing I check on a suspect battery is the DOM printed on the battery. If it’s a few years old, I would check the FCC (full charge capacity) on the packs in the HP diagnostics to quickly check. If it isn’t the charger, the battery is the second most likely failure. I’ve seen “no battery” units on the market, which is code for expanded cells and was removed to sell the laptop.
If you hook these up to an Ethernet switch or router with an actual cable (read: not WiFi — doesn’t work), you can run and check under Advanced, look for an option called “Execute Remote HP PC HW Diagnostics”. Once you do that, you go under “Component tests” and select “Power”, and in turn test the battery. If it’s below 80%, it may be time for a new battery. However, I’d try and reset the BIOS as well as recalibrate both packs even if you need to get **enough** charge on it to defeat the BIOS lockout HP is known for on the one that can handle it and then see if both units accept their original batteries.
NOTE: If you can’t use Ethernet, load the diagnostics onto the UEFI partition if it isn’t present. Click here for the utility to copy it to the UEFI partition.
If you see this screen, you don’t have it installed locally:
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Here’s how to access the diagnostics remotely:
If that doesn’t work, reset the BIOS to factory defaults — disconnect both the primary and CMOS for 30 seconds, let the notebook settle for a minute while it reloads the backup BIOS and see if the issue remains.
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