Laptop shuts down at 35-40% battery without warning.

[Cheebu]

I own an HP Pavilion 17" notebook. Recently I noticed that with battery power (DC) the notebook shuts off without any warning at 35-40% battery level. And whenever I turn on the power it doesn't come on except I plug in the AC adapter. When it comes on, the system clock is always telling the wrong time though the battery meter doesn't indicate that it was drained. It shows 45% or thereabouts. I don't ever experience this unexpected shutdown with AC. Please how do I fix this?

[visruth]

Hi,


Time keeping is by RTC (Real Time Clock) battery. So you may have to replace this.

About primary battery drainage, please do battery test from HP support assistant. Let me know the cell voltages, cycle count etc

What is the age of battery?


Regard

Visruth

[Cheebu]

Cell voltage 1: 4159mV

Cell voltage 2: 4160mV

Cell voltage 3: 4051mV

Cell voltage 4: 4166mV

Cycle count: 275/300

Battery age: 654 days

Terminal voltage: 16536mV

Design voltage: 14600mV

[visruth]

Hi,


Voltages are good enough to say that battery is in good working condition

But cycle count is reaching the 'end of tunnel' of total charge capacity of battery.

You may need to manually calibrate battery, use this document to know how to do it:
http://support.hp.com/in-en/document/c04700771

Then do a hard reset: http://support.hp.com/in-en/document/c01684768

Reload BIOS to defaults: http://support.hp.com/in-en/document/c00034791

Power on with both connected and see if there is unexpected shutting down


Regards

Visruth

[Cheebu]

I have calibrated yet it shuts down at 35%. The laptop now takes longer to reach full charge. It can be stuck at 99% for hours. Could it be a malware or Windows Update?

[visruth]

No, manually calibrate once again.

If that doesn't get it going, you may need to replace it with new one.

[qammari143]

It seems that it considers this a “critically low voltage”.

Rather than run until it just dies, At some voltage, your laptop decides to give up. To Take its remaining energy and gracefully shut down.

1. Click on the battery meter on taskbar & click more power option.
2. On your current power plan click change plan settings.
3. Click on Change Advance power Settings.
4. Scroll to botton and click the + sign of the battery, a list will appear at bottom.
5. Click on low battery level and change the following setting:

on battery to: 40 % (if ur system shut downs at 30% this will warn you battery low at 40%)

now click on Critical battery level and change the setting to 35%.

Now click on critical battery action and change the setting to hibernate.

This will hibernate you system before the battery is over and prevent it from sudden shutdown. If possible set the battery %age to little more less as the sudden shutdowns differs everytime.

Charge to 100% then let it work until it dies then recharge. If same thing happens, buy a new battery

Find more about laptop shutting down issue

[Bharat14coder]

Charging starts and stops automatically, laptop shuts down around 40% suddenly,I have changed old battery which damaged due to this problem ,still same problem with new battery. Hardware part,charging sections inside the laptop,connection point,adapter everything  has been checked and are fine.Is this a windows bug? how to fix?plz help

[HumbleBumbleBee]

Hi! I have the exact same issue and it also started around 20th of december. What is going on...

[Shekhar07]

hi, I have a HP notebook ( ay-511tx) and it is showing weird technical issues i.e.,

1. it turns off on its own earlier @ 20% then @ 30% and today @ 40% battery level.

2. it doesn't show low battery warning even after I default reset respective settings.

3. the adapter gets disconnected and then connected on its own.

around 1 month ago it got discharged by my mistake thrice in three days in a row.

 i have battery test report.

if you can advise me in this regard. 

thanks, 

Piyush