Does the Win8 system find that the battery has no power during important conferences or long flights? Even with the use of new technologies, a single-charging laptop or tablet can only last for so long. This technique is used to make full use of power. The following describes how to extend the battery life of your computer: select an energy-saving power plan. Windows 8 has two default plans: "balance" and "energy saving ". Note that this method is not applicable to Windows RT or computers connected to the standby mode, because the only default plan for this type of computer is "balance", but can be customized to save more power. Your computer manufacturer may provide other plans. Reduce the brightness of the monitor. The display consumes the most power among all components of the computer. To change the brightness of a display, gently sweep from the right edge of the screen to the center, and then click "set ". (If you use the mouse, point to the upper-right corner of the screen, move the pointer down, and then click "set ".) Click or click "brightness" to change the brightness. Some computers have buttons or buttons dedicated to changing the brightness of a display. To check whether your computer has this function, view the information that comes with your computer or visit the manufacturer's website. Reduce the time before Windows is dimmed and the display is turned off. Without a laptop or tablet (even if the time is short), you can save power by darking and disabling the monitor after a period of inactivity for Windows. To enable the "power options" option by selecting Windows to darken and turn off the display time, sweep the right edge of the screen to the center and click "Search" (if you use the mouse, point to the upper-right corner of the screen, move the pointer down, and then click "Search"), enter the control panel in the search box, and then click or click "application" and "Control Panel" in sequence ". In the control panel search box, Enter the power and press Enter. On the left side of the select or custom Power Plan page, click or select the time when the monitor is disabled ". On the Change Plan settings page, select the display settings to be used for battery running and power-on a laptop or tablet. Click or click Save changes ". Note that only the current power Plan adjustment settings are available. To change the settings for other power plans, on the select or custom power plans page, click or click Change Plan settings next to the plan you want to change ". Disable or delete unused devices. Many USB devices consume power as long as they are connected. Therefore, we recommend that you remove them when you do not use them. If a USB mouse is used, replacing the mouse with a touchpad or pen can save power. Disable computer cards and integrated wireless devices. These devices also consume power, so please disable them when not in use.