Battery Not Detected

I have a E420 (1141-CT0) & ran the System Update Manager and installed the battery firmware update that was advertised. Now, the battery is not detected. Is there an option to rollback a firmware update?
Thanks a lot
Chris

Hi Chris,
Welcome to Lenovo Community Forums!
Could you please confirm whether the firmware update was successful?
Try performing the below troubleshooting steps.
Unplug AC adapter and Shutdown the system. Remove battery, Connect AC Adapter and Start windows. Uninstall Microsoft ACPI-Compliant Control Method Battery from device manager under the battery tab. Shutdown, Remove AC Adapter, Install battery, Reattach AC Adapter. Now, Power up and check.
Ensure that chipset drivers are updated to the latest version.
Hope this helps!
Best regards,
Mithun.
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