Toshiba laptop shows 250% battery charge

Jason Johanknecht
Jason Johanknecht used Ask the Experts™
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Fellow tech called me today with a question about a Toshiba laptop.  The power adapter was damaged and electrical taped to cover bare wires.  The battery lasted only minutes, yet showed 250% charged.  He replaced the power adapter and battery, and still the new battery shows 250% charge.  Current BIOS already.  Windows 10 clean install.
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Robert RComputer Service Technician

Commented:
Does the laptop power on with just battery power?  I some how feel he may have damaged the charging circuitry on the mobo. If it work with battery see how long it will last working with battery power and see if it drops below the 250% level.   One thing to try is to unplug both the power adapter and remove the battery, then  hold the power button for about 30 seconds.  Then put the battery in and check the battery status in the bios to see if it is still saying 250%. if it does the charging circuitry could have been damaged.
Distinguished Expert 2017

Commented:
Often laptops gave battery calibration tools that charges up, discharges the battery several times to assess battery capacity.

As Robert pointed out that since the battery, charger were replaced, it is possible that the board was damaged. Though I'd look at the calibration task first before taking next step on whether the charging daughter card needs and can be replaced.
Kesavan JeganarayananIT Consultant

Commented:
This notebook,remove the power, battery and press and hold power for 10 to 15 seconds
Put back the battery and charge again.

Also install / update the diagnosis utility,
https://support.dynabook.com/support/viewContentDetail?contentId=4009373

Try this link with general precautions.
https://toshiba-battery-check-utility.software.informer.com/1.0/
Top Expert 2013

Commented:
as said, the charging circuitry can be damaged; but i suggest to run sfc and dism to repair or reset the system files :
http://www.tenforums.com/tutorials/2895-sfc-command-run-windows-10-a.html
http://www.tenforums.com/tutorials/7808-dism-repair-windows-10-image.html                               DISM

you can also check if battery shows 250 % with batteryinfoView :  https://www.nirsoft.net/utils/battery_information_view.html
Iamthecreator OMIT/EE Solution Guide

Commented:
Please check the output of the following command to see if it provides more details
powercfg /batteryreport /output D:\Temp\battery_report.html /Duration 1

Replace D:\Temp with an existing folder path.
IT Manager
Commented:
I double checked the BIOS for him, and found an update.  That fixed it.
Top Expert 2013

Commented:
tx for feedback !
Jason JohanknechtIT Manager

Author

Commented:
All ideas were good ideas.  Thanks everyone for the input.

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