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Paper Tape
Posts: 1
Registered: ‎02-16-2019
Location: US
Views: 78
Message 1 of 2

Battery isnt detected on T520 after upgrading to Windows 10

I have a new battery on order.  But its a windows issue, not a battery issue.  Im currently attempting to upgrade the bios but the bios utility WINUPTP won't let me do it because my battery level is not detected.  I tried modifing the winflash ini file to not check for the battery.  That works but I get a message that the bios is not newer when trying to update with one of the files extended .FL1





So I tred to run WinUPTP instead.  It is aware of the Bios difference but complains about the battery level:


OS = Windows 10 64bit
Driver Loading....Done
System BIOS Version -> 8AET41WW
Applying BIOS Version -> 8AET69WW
System EC Version -> 8AHT27WW
Applying EC Version -> 8AHT42WW
AC adapter/Battery check....Failed.
Error : Your battery needs to be charged to avoid an accidental power-off during an update.


Is there a command line option for turning off the battery check?  I know /s is silient, but is there one for the battery check?


Community SeniorMod
Community SeniorMod
Posts: 3,311
Registered: ‎12-01-2007
Location: US
Views: 50
Message 2 of 2

Re: Battery isnt detected on T520 after upgrading to Windows 10

[Message moved to ThinkPad: T400 / T500 and newer T series Laptops section for visibility.  AG]

I am a volunteer and neither a Lenovo nor a Microsoft employee.

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