使用移动设备很方便，尤其是当您经常出差时，但这些设备受限于其电池所能提供的能量。出于这个原因，注意您正在使用的电源计划(power plan)及其设置可能会对您可用的电池时间产生巨大影响。(battery time)幸运的是，Windows 10、Windows 7 和Windows 8.1为我们提供了必要的工具来查看哪些电源计划(power plan)可用，哪些是活动电源计划以及在(power plan)电源计划(power plan)之间切换的简单方法。以下是它的工作原理：
什么是电源计划？
电源计划(power plan)是管理 PC、笔记本电脑或平板电脑如何使用电源的硬件和系统设置(hardware and system settings)的集合。可用的电源计划(power plan)取决于您拥有的 PC 类型以及其制造商是否定制了Windows中可用的(Windows)默认电源(default power)计划。一些电源计划(power plan)旨在提供高性能，同时牺牲电池寿命(battery life)，而另一些电源计划旨在让您在牺牲性能的同时获得尽可能长的电池寿命(battery life)。在Windows中，您可以在电源选项(Power Options )中看到所有可用的电源计划(power plan)窗户。
除其他事项外，Windows 电源(Windows power)计划设置了以下元素在使用电池和连接到电源(power source)时的行为方式：
- 屏幕亮度(screen brightness)，当显示器变暗和关闭时
- 当电脑休眠时
- 当硬盘关闭时
- Internet Explorer 和 Microsoft Edge 渲染网页的(Internet Explorer and Microsoft Edge render web pages)速度
- 桌面背景(desktop background)多久改变一次
- 你的无线网卡的性能(wireless network card)
- USB设备在不使用时挂起的速度有多快
- 显卡用了多少电量
- 当您合上设备的盖子或按下电源按钮时会发生什么(Power button)
- 系统中的 PCI-Express 卡使用了多少电量
- 处理器 ( CPU ) 的主动电源管理(power management)功能
- 多媒体如何在屏幕上呈现（视频播放质量(playback quality)等）
- 您收到的通知取决于您的电池电量(battery level)和电池使用情况(battery use)
如果您的 Windows 10 带有Fall Creators Update或更新版本，您可能想知道为什么在单击或点击系统托盘中的(system tray)电池图标(battery icon)时还会看到电源滑块(power slider)。
该电源滑块在活动(power slider)电源计划(power plan)之上添加了新的节能算法和技术，它必须是平衡(Balanced)的。The power slider does not change the active power plan!如果您想详细了解它的优点以及它如何帮助您节省电池，请阅读本指南：使用Windows 10 电源滑块(power slider)来节省电池或提高性能。
Windows中的(Windows)默认电源(default power)计划有什么不同
电源计划(power plan)包含影响计算机电源管理(power management)的硬件和系统设置(hardware and system settings)。默认情况下，Windows具有三种电源计划(power plan)：Power Saver、Balanced（Microsoft推荐的一种）和High Performance。
选择电源计划时(power plan)Windows所做的最明显更改会影响屏幕亮度(screen brightness)、显示器变暗然后关闭的时间，以及计算机进入睡眠状态的时间。根据您的计算机是使用电池还是插入电源(power supply)，这些更改也会有所不同。下面(Below)是每个电源计划(power plan)设置之间的比较，对于两种模式中的每一种：电池模式和插入模式。
您应该记住，上面的表格并未显示电源计划(power plan)管理的所有内容，仅显示作为用户的您最可见的方面。我们发布了其他文章，涵盖了由电源计划(power plan)管理的更高级设置，您可以在其中找到更多技术细节：
- 如何在Windows中创建或删除(Windows)自定义电源(custom power)计划
- 如何在Windows 10中使用和配置(Windows 10)省电模式(battery saver mode)
- 通过调整Windows(Windows)中的电源计划来节省电量的 13 种方法
如何在Windows中访问电源计划(Windows)
在Windows(Windows)中启用电源计划(power plan)或修改其设置很容易，但在您执行此操作之前，您首先必须知道如何访问电源计划(power plan)。如果您不知道如何找到它们，您应该阅读这篇文章，其中涵盖了访问电源计划的所有方法：在Windows中(Windows)访问电源(access power)计划(power plan)的9 种方法。
现在您知道什么是电源计划(power plan)以及如何使用它们，让我们看看您可以使用哪些方法来切换Windows 使用的活动电源计划：(power plan)
1.在任何Windows 版本(Windows version)中，使用控制面板(Control Panel)中的电源选项部分(Power Options section)切换电源计划(power plan)
首先(First)，按照本指南中描述的方法之一，从控制面板访问电源计划部分：在(Control Panel)Windows中访问电源计划的 9 种方法。无论您使用的是Windows(Windows) 10、Windows 7 还是Windows 8.1 ，您都应该会看到类似于以下屏幕截图的窗口。
在这里您可以查看您的活动电源计划(power plan)，并根据需要进行更改。默认情况下，所有Windows操作系统都使用平衡（推荐）(Balanced (recommended)) 电源计划(power plan)。要切换到要使用的另一个电源计划(power plan)，例如省电(Power saver)计划或高性能(High-performance)计划，请通过单击或点击来选择您想要的计划。
这就是全部：如果需要，您现在可以关闭控制面板。(Control Panel)
2.使用Windows 移动中心(Windows Mobility Center)切换电源计划(power plan)，在任何Windows 版本(Windows version)
切换到Windows 设备(Windows device)上可用的另一个电源计划(power plan)的另一种方法是使用Windows 移动中心(Windows Mobility Center)。有几种方法可以打开它，您可以在本指南中找到其中的一些方法：如何使用Windows 移动中心(Windows Mobility Center)充分利用您的笔记本电脑。但是，如果您赶时间，您应该知道，无论您拥有什么版本的Windows ，打开它的一种快速方法是使用搜索功能(search feature)查找“Windows 移动中心”。("Windows Mobility Center.")
Windows 移动中心(Windows Mobility Center)窗口只有一些小的视觉差异，在所有Windows版本中看起来都相同。
要切换到另一个电源计划(power plan)，请单击或点击(click or tap)电池状态(Battery Status)列表，然后选择要激活的新电源计划。(power plan)
现在您可以关闭Windows 移动中心(Windows Mobility Center)。
3.在Windows 7和 Windows 8.1中，使用系统托盘(system tray)中的电池图标(battery icon)切换电源计划(power plan)
如果您使用的是Windows 7或Windows 8.1 ，您还可以使用(Windows 8.1)系统托盘中的(system tray)电池图标(battery icon)在两个最近使用的电源计划之间切换。
只需单击或点击(click or tap)它，就会出现一个小窗口。在其中，您可以选择要启用这两个电源计划中的哪一个。
单击(Click)或点击桌面上空白区域的任意位置，您就完成了。
结论
现在您知道什么是电源计划，哪些是Windows中的(Windows)默认电源(default power)计划，它们之间有什么区别以及如何在电源计划之间切换，如果您有任何问题，请告诉我们。您是否发现在电源计划之间切换很容易？它们是否按您的预期工作？有关Windows的更多文章，请查看我们的一些相关指南，如果您有任何建议、疑问或问题，请随时使用下面的评论部分。
What are power plans and how to switch between them in Windows
Using a mobile deviсe is handy, especially when you travel a lot, but these devices are limitеd by the amount of energy their batteries can proνide. For this reason, paying attention to thе power plan that you are using and іts settings can make a huge differenсe in how mυch battery time you have available. Fortunatelу, Windows 10, Windows 7 and Windows 8.1 provide us with the necessary tools to see which power plans are available, which is the active power plan and easy wayѕ to switch betwеen рowеr plans. Here is how it all works:
What is a power plan?
A power plan is a collection of hardware and system settings that manages how your PC, laptop, or tablet uses power. The power plans available depend on the kind of PC that you have and whether its manufacturer did or did not customize the default power plans available in Windows. Some power plans are designed to deliver high performance while compromising battery life while others are made so that you get as much battery life as possible while compromising the performance. In Windows, you can see all of the available power plans in the Power Options window.
Among others things, Windows power plans set how the following elements behave when on battery and when connected to a power source:
- The screen brightness, when the display dims and turns off
- When the computers sleeps
- When the hard disk turns off
- How fast Internet Explorer and Microsoft Edge render web pages
- How often the desktop background changes
- The performance of your wireless network card
- How quickly USB devices are suspended when they are not used
- How much power is used by the graphics card
- What happens when you close the lid on your device or when you press the Power button
- How much power is used by the PCI-Express cards in your system
- The processor's (CPU) active power management features
- How multimedia is rendered on the screen (video playback quality, and so on)
- The notifications you get depending on your battery level and the battery use
If you have Windows 10 with Fall Creators Update or newer, you might wonder why you also see a power slider when you click or tap on the battery icon from the system tray.
That power slider adds new power saving algorithms and technologies, on top of the active power plan, which has to be the Balanced one. The power slider does not change the active power plan! If you want to learn more about its benefits and how it can help you save battery, read this guide: Use the Windows 10 power slider to save battery or increase performance.
What is different between the default power plans in Windows
A power plan contains both the hardware and system settings that influence your computer's power management. By default, Windows has three power plans: Power Saver, Balanced (the one recommended by Microsoft) and High Performance.
The most visible changes made by Windows when you select a power plan affect the screen brightness, the time until the display is dimmed and then turned off, and the time until your computer is put to sleep. These changes are also different depending on whether your computer is using the battery or it is plugged into a power supply. Below is a comparison between the settings of each power plan, for each of the two modes: on battery and plugged in.
You should keep in mind that the tables above do not show all the things that are managed by a power plan, only the most visible aspects to you as a user. We have published other articles that cover the more advanced settings managed by a power plan, in which you can find more technical details:
How to access the power plans, in Windows
Enabling a power plan or modifying its settings is easy in Windows, but before you can do that, you first have to know how to access the power plans. If you do not know how to get to them, you should read this article that covers all the methods to access power plans: 9 ways to access the power plans in Windows.
Now that you know what power plans are and how to get to them, let's see which are the methods that you can use to switch the active power plan used by Windows:
1. Switch the power plan by using the Power Options section from the Control Panel, in any Windows version
First of all, access the power plans section from the Control Panel, by following one of the methods described in this guide: 9 ways to access the power plans in Windows. You should get to a window similar to the screenshot below, regardless of whether you use Windows 10, Windows 7 or Windows 8.1.
This is where you can see what your active power plan is, and change it if you want to. By default, all Windows operating systems use the Balanced (recommended) power plan. To switch to another power plan to use, such as the Power saver or the High-performance plans, select the one you want by clicking or tapping on it.
This is all: you can close Control Panel now if you want.
2. Switch the power plan by using the Windows Mobility Center, in any Windows version
Another method to switch to another power plan available on your Windows device is to use the Windows Mobility Center. There are several ways to open it, and you can find some of them described in this guide: How to make the most of your laptop with the Windows Mobility Center. However, if you are in a hurry, you should know that one fast way to open it regardless of what version of Windows you have, is to use the search feature to look for "Windows Mobility Center."
With only a few small visual differences, the Windows Mobility Center window looks the same in all Windows versions.
To switch to another power plan, click or tap on the Battery Status list and select the new power plan that you want to activate.
Now you can close the Windows Mobility Center.
3. Switch the power plan by using the battery icon from the system tray, in Windows 7 and Windows 8.1
If you are using Windows 7 or Windows 8.1, you can also switch between the two recently used power plans using the battery icon from the system tray.
Just click or tap on it, and a small window should appear. In it, you can select which of these two power plans you want to enable.
Click or tap anywhere on a blank space on the desktop and you are done.
Conclusion
Now that you know what power plans are, which are the default power plans in Windows, what are the differences between them and how to switch between power plans, let us know if you have any questions. Do you find it easy to switch between power plans? Are they working as you would expect? For more articles on Windows, check out some of our related guides and if you have any suggestions, questions or problems, do not hesitate to use the comments section below.
