The fastest ways to extend battery life today

Your laptop battery drains fastest when your screen is at full brightness, your processor is working hard, and background programs are running. Lowering screen brightness to the lowest comfortable level, closing unused browser tabs and applications, and enabling your laptop's battery saver mode can add two to four hours to a single charge. These changes take seconds to make and work on any laptop.

The second layer is thermal management. A hot laptop works harder and drains faster. Keep your vents clear of dust, use the laptop on a hard flat surface rather than a bed or pillow, and avoid direct sunlight. If your laptop feels warm to the touch during normal use, compressed air (available at any hardware store for under $10) can clear dust from the vents in about five minutes.

Third, disable features you are not using right now. Bluetooth, Wi-Fi, and keyboard backlighting all draw power. Turn them off when you do not need them. On Windows, use the Quick Settings menu (swipe from the right edge or press Windows + A). On Mac, use Control Center in the top-right corner.

Key Takeaways

  • Reduce screen brightness to the lowest level you can read comfortably, which alone can extend battery life by one to two hours per charge.
  • Close browser tabs and background applications that you are not actively using, since each one consumes processor power and drains the battery.
  • Enable battery saver mode (Windows) or Low Power Mode (Mac) to automatically reduce performance and extend runtime by 20 to 40 percent.
  • Keep your laptop vents clear of dust and use it on a hard surface so the cooling system does not have to work as hard.
  • Turn off Bluetooth, Wi-Fi, and keyboard backlighting when you are not using them, since these features draw power even when idle.

Adjust display settings for the biggest when ready gain

Your screen is the single largest power consumer in a laptop. Reducing brightness from maximum to 40 percent can extend battery life by one to two hours on a full charge. Start by lowering brightness to the point where you can still read text comfortably without squinting, then go slightly lower.

On Windows, press the Windows key and type "brightness" to open the brightness settings, or use the Quick Settings panel. On Mac, open System Settings, go to Displays, and drag the brightness slider left. Both systems let you set a keyboard shortcut so you can adjust brightness without opening a menu.

If you spend long hours at the laptop, also enable dark mode. Dark mode does not save battery on older LCD screens, but on newer OLED and modern LED displays, dark pixels use less power than bright ones. On Windows, go to Settings > Personalization > Colors and select Dark. On Mac, go to System Settings > Appearance and choose Dark.

Close background applications and browser tabs

Every open process and browser tab forces your processor to do work, even if you are not looking at it. Closing unused tabs and quitting programs you are not actively using can extend battery life by 30 minutes to an hour, depending on what was running.

On Windows, open Task Manager (right-click the taskbar and select Task Manager, or press Ctrl + Shift + Esc). Look at the CPU and Memory columns. Any program using more than 5 percent CPU is worth closing if you do not need it. Right-click it and select End Task. On Mac, open Activity Monitor (Applications > Utilities > Activity Monitor), click the CPU tab, and look for processes using more than 5 percent. Select it and click the X button to quit it.

Browser tabs are a common culprit. Video streaming, social media sites with auto-playing content, and news sites with live updates all consume CPU power. Close tabs you are not reading. If you need to keep many tabs open, consider using a tab suspension extension (like The Great Suspender on Chrome) that automatically pauses tabs you have not viewed in a set time.

Enable battery saver mode and adjust power settings

Battery saver mode (called Low Power Mode on Mac) reduces your laptop's performance slightly to extend runtime. On Windows 11, swipe from the right edge or press Windows + A to open Quick Settings, then click Battery Saver. On Windows 10, go to Settings > System > Battery Saver and toggle it on. On Mac, go to System Settings > Battery and select Low Power Mode.

When battery saver is on, your processor runs at a lower speed, animations are reduced, and background activity is limited. Most users notice no difference in everyday tasks like email, web browsing, and document editing. Gaming, video editing, and other demanding work will feel slower, but for typical office work, battery saver mode can extend runtime by 20 to 40 percent with almost no downside.

You can also set your laptop to enter battery saver automatically when the battery drops below a certain level. On Windows, go to Settings > System > Battery and set "Turn on Battery Saver automatically at" to 20 percent. On Mac, Low Power Mode turns on automatically at 20 percent battery by default.

Keep your laptop cool and clean

A hot processor works harder and drains the battery faster. Dust buildup in vents blocks airflow and traps heat inside. Cleaning your vents takes five minutes and can noticeably improve battery life.

Use compressed air (a can costs $5 to $10 at any hardware or office supply store). Power off your laptop completely, then hold the can upright and use the thin straw attachment to blow air into the vents. Blow from the outside in, holding the can about two inches away. Do this over a trash can or outside, since dust will fly out. Repeat on all sides of the laptop where you see vents.

Also use your laptop on a hard, flat surface like a desk or table. Using it on a bed, pillow, or couch blocks vents and traps heat. If you must use it on a soft surface, place a laptop cooling pad underneath (these cost $15 to $40 and use a USB connection). Keep the laptop out of direct sunlight, which heats the battery and processor.

Disable Wi-Fi, Bluetooth, and other wireless features when not in use

Wi-Fi and Bluetooth are always searching for networks and devices, even when you are not actively using them. Turning them off when you do not need them saves battery. On Windows, open Quick Settings (Windows + A) and toggle Wi-Fi and Bluetooth off. On Mac, open Control Center and click the Wi-Fi and Bluetooth icons to turn them off.

Keyboard backlighting also drains the battery. If your laptop has a backlit keyboard, turn it off when you are in a well-lit room. On most Windows laptops, press Fn + spacebar or Fn + the brightness down key. On Mac, press Fn + the brightness down key repeatedly until the backlight turns off.

Location services and Bluetooth scanning consume power even when you are not using them. On Windows, go to Settings > Privacy & Security > Location and toggle it off. On Mac, go to System Settings > Privacy & Security > Location Services and uncheck the boxes for applications that do not need your location.

Manage power settings and sleep behavior

Your laptop can be set to sleep (a low-power state where the screen and most components turn off) after a period of inactivity. This saves far more battery than leaving the screen on. On Windows, go to Settings > System > Power & Battery > Screen and sleep. Set "Turn off my screen after" to 5 or 10 minutes, and "When plugged in, put my device to sleep after" to 15 or 30 minutes. On Mac, go to System Settings > Lock Screen and set "Turn display off after" to 5 or 10 minutes.

You can also adjust what happens when you close the lid. On Windows, go to Settings > System > Power & Battery > Power and sleep and set "When I close my lid" to Sleep. On Mac, closing the lid automatically puts the laptop to sleep by default.

Avoid using Hibernate mode on Windows if you want to extend battery life. Hibernation saves your session to disk and powers off completely, which uses no battery, but it takes longer to wake up. Sleep mode is faster to wake from and uses very little power, so it is the better choice for short breaks.

Frequently Asked Questions

Does closing the laptop lid actually save battery?

Yes. Closing the lid puts your laptop into sleep mode, where the screen and most components power down. A sleeping laptop uses almost no battery. If you step away for more than a few minutes, closing the lid is the fastest way to save power.

Will lowering brightness make it hard to see my screen?

Start by reducing brightness to 40 to 50 percent and use it for a day. Your eyes adjust quickly, and most people find they can work comfortably at this level. If you work in a very bright room, you may need to keep brightness higher, but even a 20 percent reduction helps.

Can I damage my battery by using battery saver mode all the time?

No. Battery saver mode only reduces processor speed and background activity—it does not change how the battery charges or discharges. Using it constantly will not harm the battery. Modern laptop batteries are designed to handle frequent charging and discharging.

How often should I clean the vents?

Clean the vents every three to six months if you use your laptop daily, or once a year if you use it occasionally. If you notice the laptop running hot or the fan spinning loudly, clean the vents when ready. Dust buildup is the most common cause of overheating.

Does using an external mouse instead of the trackpad save battery?

Slightly. A wireless mouse uses a small amount of power, but less than the trackpad uses when you are actively clicking and dragging. The difference is small—usually under 10 minutes per charge—but if you are trying to squeeze every bit of runtime, a wired mouse uses even less power than a wireless one.