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Laptop battery keeps burning out. Voltage mismatch puzzle.


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#1 Old_Feller

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Posted 02 May 2016 - 11:13 AM

I have a Toshiba A105-S4094. I've had two batteries blink out on me. The computer gets turned off. The next day when I try to use it, the battery is "open"; meaning no voltage or current flows from it's contact bars. It won't respond even when plugged in. It's open circuit.
 
This computer has specified on it, as clear as can be "15 volts". But on ebay, every battery I can find that claims compatibility with the A105-S4094 is rated 10.8 or 11.1 volts. The charger, which is an after-market replacement, also is stamped "15 volts".
 
What is going on?
 
Thanks for your suggestions.
 
Old Feller

Edited by Queen-Evie, 02 May 2016 - 05:31 PM.
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#2 JohnC_21

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Posted 03 May 2016 - 07:54 AM

I think you may have a defective charging circuit on the motherboard. On my HP laptop the charger is 18.5V and the battery is 11V. 



#3 Old_Feller

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Posted 03 May 2016 - 09:35 PM

Thanks John. Is there any way to confirm that?



#4 Old_Feller

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Posted 03 May 2016 - 10:14 PM

Do you know how these batteries are built? I'm wondering what it is inside that could "open". Must be some sort of overload switch, thermal switch or fuse, I expect. But it's so strange that it happens when the laptop is shut down. Whatever it is, it opens and never closes the circuit again (unless there is something completely different happening).

 

O_F


Edited by Old_Feller, 03 May 2016 - 10:26 PM.


#5 JohnC_21

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Posted 04 May 2016 - 08:15 AM

I believe there is a chip in the batteries that notifies the OS how much charge state is left and also at one point it will refuse to recharge the battery. I don't know of any way of resetting the chip though.

 

http://superuser.com/questions/548366/reset-laptop-battery-data-or-interface-battery-chip

 

If you are on Windows 7 or later you can run this command. It will give you the state of the battery in a report.

 

http://www.howtogeek.com/howto/7638/use-powercfg-in-windows-7-to-evaluate-power-efficiency/

 

If you have Windows 8 or later you can generate a battery report with this command at an elevated command prompt.

 

powercfg /batteryreport

 

http://www.howtogeek.com/217255/use-the-hidden-powercfg-tool-to-optimize-battery-life-on-windows/


Edited by JohnC_21, 04 May 2016 - 08:39 AM.


#6 Old_Feller

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Posted 04 May 2016 - 10:00 AM

Thank you.






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