Laptop showing CPU, GPU and NPU activity while AI features run.
Photo Credit: AI-Generated
AI features can drain battery, especially when they run continuously; the impact depends on the workload and whether it uses the CPU, GPU or NPU.
An NPU can handle supported AI tasks more efficiently, but Copilot+ does not guarantee longer battery life.
For better battery life, switch off unnecessary AI features, use Energy Saver and check the processor, display and battery capacity before buying.
AI features still use battery power, but the impact depends on what the laptop is actually doing. An AI task can run on the CPU, GPU or NPU (the part of the processor designed for AI workloads), and those components can have very different power demands. A quick AI request may have little effect, while features that run continuously during a video call can keep the system working for much longer.
Microsoft’s Copilot+ guide notes that an NPU can handle supported AI workloads more efficiently than the CPU or GPU. That can reduce power use for that specific task, but it does not mean every AI feature will improve battery life or that every Copilot+ laptop will last longer than a conventional laptop with a larger battery.
Let's look at which AI features actually affect battery life, where that work happens, and what I would switch off when I need more time away from the charger.
| AI feature or workload | Where it runs | How it affects battery |
|---|---|---|
| Copilot+ features | NPU for supported tasks; some features use CPU/GPU or cloud | The Copilot+ label itself does not guarantee longer battery life |
| AI features using CPU or GPU | CPU or GPU | Can use more power than an equivalent NPU workload |
| AI camera effects | NPU, CPU or GPU depending on the software | Can create a continuous load while the camera is active |
| Recall and background AI | NPU and other system resources | Can add ongoing processing while these features are enabled |
| Local AI processing | CPU, GPU or NPU | Higher drain when the laptop is processing for several minutes |
| NPU-optimised AI tasks | NPU | Can use less power for supported workloads |
| Battery-saving settings | System-wide | Turning off unnecessary AI features and using Energy Saver can reduce overall drain |
Copilot+ refers to Windows 11 PCs with an NPU capable of more than 40 TOPS, along with a set of features designed to use that hardware. Many of these laptops also use newer Snapdragon X or Intel Core Ultra processors that were designed with efficiency in mind.
That matters because battery life comes from the combination of the processor platform, battery capacity, display and workload. The Copilot+ badge groups together a set of AI capabilities; it does not promise a fixed number of extra hours.
A simple Copilot chat that sends a request to the cloud is closer to using a browser-based service than running a demanding AI model locally. It still uses some processing, display power and network activity, but it is unlikely to be the main reason a laptop runs out of battery halfway through the day.
The presence of an NPU does not mean every AI feature will use it. An application can still run an AI workload on the CPU or GPU depending on how the software has been implemented.
That can apply to things such as browser-based image enhancement, creative filters or third-party meeting effects. Task Manager in current Windows 11 builds can show NPU activity alongside CPU and GPU use. If the NPU stays idle while an AI effect is running, the workload is being handled elsewhere.
This also matters if the NPU is disabled. A discussion about turning the NPU off points out that disabling it can push tasks such as background blur onto the CPU, which may increase the processor load. I would leave the NPU enabled and switch off individual features I do not need instead.
Background blur, eye-contact correction, auto-framing and voice focus are different from a one-time AI task because they can remain active for the entire video call.
A Windows Forest battery test on a Surface Laptop measured about 11 hours 24 minutes with the NPU effects path off and about 8 hours 5 minutes with Windows Studio Effects enabled. That was one test on one laptop, so I would not treat the numbers as universal battery estimates. It does, however, show why a live camera effect can matter more than a one-off AI request.
If most of my day is documents and browser tabs, I would not keep those effects running unnecessarily. I can go to Settings, then Bluetooth & devices, then Cameras, then Windows Studio Effects and enable them when I actually need them for a call.
Recall and similar features take periodic snapshots of what is on screen so they can be searched later. That means the laptop has to capture, process, index and maintain that information instead of simply sitting idle between tasks.
In a Copilot+ Surface thread, one owner of two Snapdragon X laptops described additional AI services and associated resource use, including battery impact, and listed ways to disable Recall and related features. Another reply said idle behaviour looked normal with Recall disabled and Click to Do left on. These are individual experiences, not a controlled test, but they show why background features can behave differently across machines.
A Windows Insider post described an NPU remaining at 100% on battery even with Recall disabled on a preview build. I would treat that differently from normal background activity. If Task Manager shows the NPU heavily loaded while I am only reading email or browsing, I would check for a software update or a feature that has been left running.
A large AI model running locally can keep the CPU, GPU or NPU busy for several minutes, especially when I am generating images, rewriting long documents or running another demanding task. That creates a noticeable but relatively concentrated battery load.
A cloud-based AI service shifts most of the heavy processing away from the laptop. The laptop still uses power for the display, processor and network connection while it waits for the result, but it is not doing the full model computation locally.
Neither approach is automatically more efficient in every situation. I would use local AI when I need the work offline or want to keep processing on the device. For occasional questions, cloud AI may put less sustained load on the laptop. The bigger battery hit is usually a local workload that keeps running after I have stopped actively using it.
An NPU can reduce power use when software is specifically designed to move a supported AI task away from a less efficient CPU or GPU path. That is the main reason manufacturers put dedicated AI hardware into newer processors.
The benefit depends on the software and workload. An NPU only helps when the application actually uses it.
For a full day away from a charger, I would still pay attention to the things that affect almost every workload: screen brightness, refresh rate, background sync, processor family and battery capacity. Energy Saver remains useful regardless of whether the laptop carries a Copilot+ badge.
I would keep Windows Studio Effects off unless I am on a call, disable Recall if I have no use for its timeline, and turn off browser or Edge AI enhancement features when I cannot see enough benefit to justify the extra processing.
For a long stretch away from a socket, I would also enable Energy Saver and keep the display at a brightness level I can comfortably read rather than running it brighter than necessary.
If battery life is my priority when buying a laptop, I would compare the processor family and battery capacity in watt-hours first. I would treat AI features as extras I can switch on when they are useful. The NPU is there to handle supported AI workloads more efficiently when I actually need them, not to guarantee longer battery life on its own.
Does having an NPU improve laptop battery life?
An NPU can improve efficiency for supported AI workloads, but it does not automatically make the whole laptop last longer. The software has to use the NPU, and overall battery life still depends on factors such as the processor, display, battery capacity and workload. Microsoft says Copilot+ AI features designed for the NPU can improve battery life for those workloads.
Do AI features drain laptop battery?
Yes. AI features use some battery power, but the amount depends on what the feature is doing and where the workload runs. A continuously active camera effect can have a different impact from an occasional cloud-based AI request. Microsoft also notes that some Windows Studio Effects can have a significant effect on performance and battery life on certain devices.
Does Copilot+ mean better laptop battery life?
No. Copilot+ identifies Windows PCs with a qualifying NPU and supported AI capabilities; it is not a battery-life rating. Microsoft defines Copilot+ PCs around an NPU capable of more than 40 TOPS, but actual battery life still depends on the complete laptop configuration and workload.
Do Windows Studio Effects use more battery?
They can. Features such as background blur, eye contact and automatic framing run while the camera is active, so they can create a continuous workload. Microsoft specifically notes that these effects can have a significant effect on performance and battery life on some devices.
Does every AI feature on a laptop use the NPU?
No. AI software can use the CPU, GPU or NPU depending on how the application is designed. Microsoft notes that applications need to be specifically programmed to take advantage of the NPU, and Task Manager can show NPU resource usage on supported systems.
Should I turn off the NPU to save battery?
I would not turn off the NPU just to save battery. It is better to disable individual AI features I do not need and let supported workloads use the NPU when required. Disabling the NPU can also move some work back to the CPU or GPU rather than eliminating that processing altogether.
If battery life is a priority, check the processor, battery capacity in watt-hours and display before paying extra for AI features. Once you have the laptop, use Task Manager to see whether AI workloads are actually using the NPU, CPU or GPU, and switch off features you do not use regularly.
Disclaimer: AI features, NPU support and battery behaviour vary by laptop, software and Windows version. Battery results from one device or workload should not be treated as universal. Check the specifications and supported features of the exact model before buying.
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