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Laptop battery strange behavior


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#1 GoshenBleeping

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Posted 07 October 2016 - 05:18 PM

System:  Windows 7 Home Premium 64 bit

Laptop:  ASUS K52F with ASUSTEK (original) battery,  Intel Core I5 processor @ 2.4 GHz, 4GB memory

 

When the battery gets down to about 47% - which takes about 40 minutes - the laptop shuts off.  Clearly this is way too fast.  In AC power with or without the battery the laptop runs without a problem. I ran Battery Eater but the laptop shut down before this program could produce any results.  I also ran BatteryView to log the battery charge and this is where it gets weird. Below is a segment of this log.

 

                                                              Capacity Capacity     Rate      Voltage

                                                                             Value

10/7/2016 10:13:30 AM    Discharging    85.9%    25,575    -16181    11,295    Timer    
10/7/2016 10:14:00 AM    Discharging    85.3%    25,399    -16962    11,234    Timer    
10/7/2016 10:14:30 AM    Discharging    84.8%    25,234    -17424    11,210    Timer    
10/7/2016 10:15:00 AM    Discharging    84.3%    25,080    -24563    10,977    Timer    
10/7/2016 10:15:30 AM    Discharging    116.0%    34,529    -13893    10,950    Timer    
10/7/2016 10:16:00 AM    Discharging    115.6%    34,408    -14883    11,242    Timer    
10/7/2016 10:16:30 AM    Discharging    115.2%    34,287    -14960    11,247    Timer    
10/7/2016 10:17:00 AM    Discharging    114.8%    34,177    -13013    11,304    Timer    
10/7/2016 10:17:30 AM    Discharging    114.4%    34,067    -13299    11,296    Timer    
 

How can the capacity rise above 100%?  Is this a battery problem or a problem with the Windows charging software?  There are lots of posts about laptops shutting down at about 50% power.  But none of the remedies in these posts works for me.

 

Suggestions?  Comments?



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#2 JohnC_21

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Posted 07 October 2016 - 05:36 PM

It's not as comprehensive as Windows 8 but at an elevated command prompt type the following

 

powercfg /energy

 

It will create a HTML report. There will be a battery section that will show battery's design capacity and what the capacity is on the last full charge. If the last full charge is low that may indicate a failing battery.



#3 GoshenBleeping

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Posted 09 October 2016 - 08:22 AM

Thank you for the information.  I ran the report.  The last full charge was only about half of the battery's rated capacity.  Clearly the battery if failing.  Thanks for the help.






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