HP 840 G2 - battery error 601, but...

[ThomasJack]

Hi there!

Sorry for the amount of text you're about to read.

So I have a weird and annoying problem with my battery in my HP 840 G2 (Win10 64b)

.

After buying it few days ago (fully reset and restored to default), for the first time running (just checking if it works) I noticed that the battery is at 0% so I decided to turn it off and charge it - I was surprised that after ~2 hours, it still had 0%.

Hovered over the battery and there was "0% plugged in, not charging" (battery wasn't charging at all).

Tried the trick with pulling out the battery, holding the power button for 15/20/30s (tried a lot of times in different varieties) and putting the battery back (or also turning on without battery but with charger in and then removing the ACPI battery drivers).

Long story short - turned out that I have a BIOS from ~2015 (probably 01.07), so updated to the latest (01.28) and...

... new problem occured.

After restarting from the successful BIOS update, I saw a screen with error code 601 (and for every restart since then).

Skipped it and this time, hovering over the battery showed "0 min, 100%". At least now the battery is "charging".

Again playing with drivers, holding power button for 15/20/30s with battery, updating the BIOS (tried updating to the same version).

HP Support Assistant -> Battery check tool shows Discharging (100%), Primary battery: very low

HP PC Hardware Diagnostics -> Component tests -> Battery -> Battery check -> Run once shows Result: CANCELED (also AC Adapter test resulted in being CANCELED

I've already visited a big amount of sites and tried so many things - nothing (including things above) helped.

So, if anyone has any advices, I would be very grateful.

Best regards,

Thomas

Edit: Forgot to mention: the laptop is running for like 70 minutes now (browsing the Internet) on battery only - still showing "0 min, 100%".

[Huffer]

Did you buy the computer or the battery a few days ago? Looks like a defective battery to me. 

[ThomasJack]

No, no, bought the laptop, not a battery.

Btw. I just noticed something (probably) weird - when you click the battery icon (bottom right corner) once, I can see that the battery #1 is not present and battery #2 is in use (does it change anything?).

[Huffer]

No your laptop is able to have a clipon external battery that is not present. The main internal battery is #2. Not uncommon to buy a used laptop with a bad or nearly bad battery. I am sure if you replace the battery it will be fine. 

[ThomasJack]

So there's nothing I can do with that battery/battery situation?

Would downgrading BIOS version help somehow?

Or restoring Win10 again?

[Huffer]

There is absolutely something you can do....replace the battery. BIOS/software has nothing to do with it you have a disfunctional battery.