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  • Registered: ‎02-23-2021
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ThinkPad P73: battery drain after update

2021-02-23, 1:33 AM

Hello. My ThinkPad P73 loses battery rapidly after BIOS update from Lenovo Vantage. I remember I had the same issue with the previous BIOS update until there was a Thermal Solution update... I was waiting for a Thermal solution Driver update this time too, and it actually was released but did nothing to my battery drain and overheating. Should I just wait for a new BIOS/thermal solution update for months or is there any other solution?



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Re:ThinkPad P73: battery drain after update

2021-02-23, 11:25 AM

Hi astr7,


Welcome to the Community Forums.


Personally I'd revert back to a previous BIOS version, then update when I see a new possible thermal solution is out again.


BIOS Back Flash
- Completely shut down the device.  
- Press F1 repeatedly on startup to enter BIOS.
- In the "Security" Tab, click "UEFI BIOS Update Option" then set "Secure Rollback Prevention" to "Disabled"
- Click the "Restart" Tab and click "Save Exiting Changes" or Press "F10"
- PC will Restart and enter the Windows Environment.
- Head over to the Support Page for your device.
- Under Drivers & Software, Manual Update, then BIOS section, you can find the latest BIOS version.    
- Expand the BIOS driver with the down arrow. Right Click then select "Copy Link Address"
- Paste it into the URL section of the browser
- Change the nr of the bios version  (ex: 8HCN36WW  to 8HCN35WW or 8HCN34WW) and hit enter.
- Do this in the URL input section of the browser until you find the previous BIOS version to download.
- Right click the file and select "Run as Administrator"
**Note: You can also attach the file to a USB flash drive, boot from USB through BIOS and then run it that way.
**Note: Make sure the AC adapter is connected and that you have at least 30% battery charge when performing this update.





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