Why can't lenovo thinkpad t470 battery alarm on the Windows work normally?

For the Windows 7 operating system, you can configure your computer so that when the battery power falls below a certain level, three events occur: the alarm goes off, a message is displayed, and the computer display is turned off. To enable the battery alarm, do the following:
1. Start the Power Manager program.
2. Click the Global Power Settings tab.
3. For Low battery alarm or Critically low battery alarm, set the percentage of the power level and set the action.

Source from manual.

lenovo thinkpad t470 battery

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