You can use the battery meter to put a different power plan into effect. Although the battery meter is more commonly used with mobile PCs, it can also appear on a desktop computer if the computer is plugged into a USB uninterruptible power supply (UPS) or other short-term battery device.
The battery meter is located in the notification area of the Windows taskbar. The battery meter makes it easy for you to monitor the power consumption of your mobile PC while you're using it.
When you hover over the battery icon, you can see the percentage of battery charge remaining and the power plan that Windows is using.
The battery meter also indicates whether your mobile PC is plugged in or running on battery power. When the charge on your battery is low, the battery meter displays a notification directly above the battery icon.
The battery icon changes appearance to display the current state of the battery so that you can see how much charge remains. When the battery charge is above 25 percent, the battery icon is green. When the battery charge reaches 25 percent, a yellow triangle with an exclamation point (!) appears above the green battery icon. When the charge reaches the low-battery level, a red circle with a white "X" appears above the green battery icon.
When you click the battery icon, the battery meter indicates how much charge remains. From the battery meter, you can also switch to a different type of power plan (for example, from a plan that optimizes system performance to a plan that saves power).
To change a power plan's settings or to select a power plan that isn't shown on the battery meter, click More power options. For more information, see Battery meter: frequently asked questions.