Laptop battery says fully charged but not

Last week by battery was working fine and powering the laptop for 90 minutes plus.

It shows as 100% charged on the icon in the bottom right corner.

I have run the two diagnostics given in the forum and it says the battery is OK and working properly.

It will not power the laptop, when I try to unplug the AC adapter the laptop dies, when I try to power the laptop without the AC adapter, nothing happens. The laptop works OK on the AC adapter.

I have tried uninstalling the battery management in device manager, replacing the battery and powering on but this hasn't helped.

I have checked the BIOS and it is up-to-date.

I uninstalled the last windows update. Still no power from the battery. Have HP switched it off?

@OAP1wrote:

I understand that I may need to replace the battery. What I don't want to do is replace the battery if the laptop is at fault. Can anyone help?

There are a finite number of charge / discharge cycles with a LiOn battery.

The notebook charges the battery by way of the power adapter and the system board's charging circuit. The notebook is doing its job, but a battery will exhibit odd behavior when it approaches the latter part of its life cycle.

You have described a notebook doing what it is supposed to be doing and you will need to accept that the battery is having problems that you cannot change or rectify without replacing the battery with a new one.

The charge/discharge cycle limitation is the reason that battery manufacturers only warranty a notebook's battery for one year.

Can no one help?

No one at HP can think of a remedy for my dead laptop?

I cannot even take it to the room next door to print out anything. The laptop dies when I unplug it and I have to wait until all the valves have warmed up again before I can print.

Battery 90 minutes to zero in one week? Something else is wrong surely?

I have read in the past that HP put a lifetime on their printer cartridges. When the pass the "use by" date they stop working regardless of the amount of ink left.

Is it the same situation with my battery?

I just saw your thread today. We are not HP employees, we are customers.

You have given some conflicting information and that is why nobody has touched your thread.

You stated that you ran" two diagnostics given in the forum".

The forum does not give diagnostics to the best of my knowledge, so what diagnostics have you run?

if you unplug a power adapter and the notebook shuts down, it is usually an indication of a battery which has reached the end of its service life

I described how to run a Windows Battery diagnostic in the Notebook knowledge base,

//h30434.www3.hp.com/t5/Notebooks-Knowledge-Base/Is-your-notebook-plugged-in-and-not-charging/...

Your notebook should have a HP PC Hardware Diagnostics UEFI utility that is accessible immediately after powering on the notebook by tapping the F2 key.

There is a components section that is in theHP PC Hardware Diagnostics UEFI utility. It has a battery test.

There is also a battery test that is part of the HP Support Assistant that will allow you to test the battery.

I suggest you run those tests and give us the results here in your thread.

HP has not switched off your battery.

I just found the product name of your notebook. It is anHP Pavilion 15-n027sl model from the 2015 model year.

If that is indeed the case, I can tell you that four to five years is a decent expectation for service life of a notebook battery.

Your battery needs to be replaced with a new one if it is more than three years old and is not powering the notebook.

Hi Erico,

Thank you for taking the time to help with my problem.

I'll put my answers into your post

I understand you are not an HP employee but there are some posts on the forum from HP employees. I was hoping that one of them would help me to solve my problem since no one else had replied up to that time. It is great that you are prepared to help out those that HP abandon.

You stated that you ran" two diagnostics given in the forum".

The forum does not give diagnostics to the best of my knowledge, so what diagnostics have you run?

See below.

if you unplug a power adapter and the notebook shuts down, it is usually an indication of a battery which has reached the end of its service life.

I understand they have a finite life but the battery was working for 90 minutes plus last week and now Zero. I would expect a gradual reduction in battery - not a sudden death. The battery meter [bottom right on the screen] reads 93% at the moment, it was reading 100% earlier in the week. Why does the meter read full when it will not power the laptop?

I described how to run a Windows Battery diagnostic in the Notebook knowledge base,

//h30434.www3.hp.com/t5/Notebooks-Knowledge-Base/Is-your-notebook-plugged-in-and-not-charging/...

My battery is nearly fully charged [93%] according to the meter.

Your notebook should have a HP PC Hardware Diagnostics UEFI utility that is accessible immediately after powering on the notebook by tapping the F2 key.

There is a components section that is in theHP PC Hardware Diagnostics UEFI utility. It has a battery test.

I ran the UEFI test on startup where you tap F2 until the program starts.

The answer was that everything is OK. The battery is good.

There is also a battery test that is part of the HP Support Assistant that will allow you to test the battery.

I ran this test too.

It said everything is OK as well

One of the tests [I cannot remember which one and don't want to power down and lose all my typing] gives the individual battery voltages, I cannot remember the voltages but the were all very close [for example only say: 1.45 to 1.48 volts].

I suggest you run those tests and give us the results here in your thread.

See above.

HP has not switched off your battery.

I read on something that the battery needs a software instruction to turn it on, this instruction is given to the battery in a binary code and the battery will not start without it. Could this software be corrupt? I tried updating the bios [as recommended on this forum] but this hasn't helped.

I tried reading the voltage of the battery when disconnected from the laptop [between the two outside slots of the battery - in fact between ANY two slots on the battery] and there was zero or very nearly zero volts, maybe a couple of millivolts. Even a dead battery has a small residual voltage.

I just found the product name of your notebook. It is anHP Pavilion 15-n027sl model from the 2015 model year.

My laptop has a 17 inch screen. I don't know if the battery has been replaced or is the original fitment. It is a genuine HP part. I am [at least] the second owner of the laptop [I buy used as I don't have sufficient money to buy new]. I would take it to the retailer where I bought it but they [like me] are in lockdown.

My concern is that the battery was working fine [90 minutes+ of movie playing] and a couple of days later it is not working at all. Surely there would be a gradual reduction in usage time not a sudden death. If I have to buy a new battery then so be it but it just seems odd that it died so quickly.

Thanks again for trying to help.

To top it all off, the left click button has become eratic - it sticks sometimes now.

If you run the Battery Report it will tell you when the battery was actually made and how many cycles have been run on it [charge/discharge].

I suggest running it and copying and pasting the entire contents to a post in your thread.

That will provide sufficient information to make an informed decision on whether the battery has reached the end of its service and should be replaced.

Take a look at the Knowledge Base article I published to see what I mean. I know it is a bit lengthy, but that is the price of getting accurate information to base decisions on.

Hi Erico,

Just this second ran the app and here is the screenshot.

Best regards

OAP1

Well - that didn't work...

It says:

"Results [show advanced information]

Charging 93%

Primary battery OK"

Advanced says:

Cycle count 216 of 300

Remaining capacity 2155 mAh

Current 0mA

Terminal voltage 16364 mV

3 cells at 4094 mV and one at 4.081mV

Status DO

Adaptive battery optimiseer Not Supported

Does this help?

OAP1

That was helpful, but running the Battery Report within Windows and then copying and pasting it from the browser to a post in the thread would be even more helpful.

One statistic that you provided, "Cycle count 216 of 300", is telling a bit about the service life remaining in the design considerations of your battery. That means you can only expect a maximum of 84 more charge/discharge cycles. Your main battery is approaching the end of its service life, when you consider that it is giving you problems.

At this point, I am comfortable in stating that the battery needs to be replaced with a new one.