How does ASUS tablet Z500M check the battery power on the desktop?

ASUS Z500M tablet can display the battery charge in the notification bar at the top of the screen through the following operations:

1, click Settings-> Battery;

2. Click the tool icon in the upper right corner;

3. Check the percentage of electricity displayed;

4. The battery charge will be displayed in the notification bar at the top of the screen (as shown below).

After setting the above steps, the display of battery charge will appear in the notification bar.