The fastest way to extend battery life is to lower your screen brightness and close programs running in the background

Your laptop battery drains fastest when your screen is at full brightness and when multiple programs are using your processor at once. Reducing screen brightness to the lowest comfortable level can add two to four hours to a single charge, depending on your laptop model. Closing browser tabs, email clients, and other open programs that you are not actively using stops them from drawing power even when you are not looking at them.

Start by checking your screen brightness settings. On Windows, press the Windows key and type "brightness" to find the brightness slider. On Mac, click the Apple menu, select System Settings, then Displays, and adjust the slider. Many laptops also have brightness keys on the keyboard — usually marked with a sun icon — that let you adjust brightness without opening settings.

Next, open your task manager or activity monitor to see which programs are consuming the most power. On Windows, press Ctrl+Shift+Esc to open Task Manager, click the Processes tab, and look at the CPU column to see what is running. On Mac, open Activity Monitor from Applications > Utilities, click the CPU tab, and sort by % CPU to see the heaviest users. Close anything you do not need right now.

Key Takeaways

  • Lowering screen brightness to a comfortable level and closing unused programs are the two fastest ways to extend battery life by several hours per charge.
  • Disabling Wi-Fi and Bluetooth when you are not using them, and switching to Battery Saver mode, can add one to two hours to your remaining charge.
  • Closing browser tabs, especially those running video or animation, stops background power drain that many users do not notice.
  • Keeping your laptop cool by using it on a hard surface and cleaning dust from vents helps the battery charge and discharge more efficiently.
  • Reducing the number of startup programs and disabling visual effects like animations can improve battery life on older or slower laptops.

Turn on Battery Saver mode and disable Wi-Fi and Bluetooth when not in use

Battery Saver mode (called Low Power Mode on Mac) reduces your laptop's processing speed and limits background activity to stretch your charge. On Windows 11, click the battery icon in the system tray at the bottom right of your screen and select Battery Saver. On Windows 10, go to Settings > System > Battery Saver and toggle it on. On Mac, click the battery icon in the menu bar at the top right and select Low Power Mode.

Wi-Fi and Bluetooth use power even when you are not actively downloading or transferring files. If you are working offline or do not need to connect to wireless devices, turn them off. On Windows, click the network icon in the system tray and toggle Wi-Fi off. On Mac, click the Wi-Fi icon in the menu bar and select "Turn Wi-Fi Off." Bluetooth is usually in the same menu. You can turn them back on when ready when you need them.

Battery Saver mode does slow down your laptop slightly — animations may feel less smooth, and some background tasks pause — but the trade-off is usually worth it if you are far from a charger. You can turn it off anytime you plug in or when you need full performance.

Close browser tabs and stop video from playing in the background

A single browser tab running a video or animation uses as much power as several idle programs. If you have ten tabs open and three of them are playing video or running auto-refreshing content, those three are draining your battery much faster than the other seven. Close tabs you are not reading, and pause or mute video on tabs you are keeping open.

Some websites auto-play video when you land on them, even if you never click play. You can stop this in your browser settings. In Chrome, go to Settings > Privacy and Security > Site Settings > Media > Videos, and select "Don't allow sites to play media with sound." In Firefox, go to about:preferences > Privacy > Permissions > Autoplay and select "Block audio and video." In Safari, go to Settings > Websites > Auto-Playing Media and select "Never Auto-Play" for each site.

Browser extensions can also drain battery by running scripts in the background. If you have many extensions installed, disable the ones you do not use regularly. In Chrome, click the puzzle icon in the top right, find the extension, click the three dots next to it, and select "Remove from Chrome." In Firefox, click the menu icon (three horizontal lines) in the top right, select Add-ons, and click the trash icon next to extensions you want to remove.

Keep your laptop cool and clean the vents

A hot laptop battery drains faster and charges less efficiently than a cool one. Dust buildup in your vents blocks airflow and traps heat inside. Use your laptop on a hard, flat surface like a desk or table rather than on a bed, pillow, or your lap — soft surfaces block the vents on the bottom of your laptop. If your vents feel clogged with dust, use a can of compressed air to blow dust out. Hold the can upright, use short bursts, and keep the nozzle a few inches away from the vents.

If your laptop runs hot even on a clean desk, consider using a laptop cooling pad — a flat pad with built-in fans that sits under your laptop and pulls heat away. These cost between fifteen and fifty dollars and can lower your laptop's temperature by five to ten degrees, which extends both battery life and the lifespan of your battery itself.

Reduce the number of programs that start when your laptop turns on

Every program set to launch at startup uses a small amount of battery power as your laptop boots and runs in the background. On Windows, press Ctrl+Shift+Esc to open Task Manager, click the Startup tab, and look at the list of programs. Right-click any program you do not need to start automatically and select "Disable." On Mac, go to System Settings > General > Login Items, and remove programs from the "Open at Login" list by clicking the minus sign next to them.

Be cautious about disabling startup programs if you are not sure what they do — some are necessary for your laptop to run properly. Disable only programs you recognize and know you do not need running all the time. Common culprits that drain battery are cloud storage services like OneDrive or Google Drive, messaging apps, and media players.

Adjust power settings and disable visual effects on older laptops

Windows and Mac both have power plans that control how aggressively your laptop uses energy. On Windows, right-click the battery icon and select "Power Settings," then choose "Power Saver" or "Best Battery Life" instead of "Balanced" or "High Performance." On Mac, go to System Settings > Battery, click the dropdown next to "Low Power Mode," and select "Automatic" so it turns on when your battery is low.

If your laptop is several years old, disabling visual effects like window animations and transparency can free up processing power and extend battery life. On Windows 10 or 11, right-click "This PC" or "My Computer," select Properties, click "Advanced System Settings," go to the Advanced tab, and click Settings under Performance. Select "Adjust for best performance" to turn off all visual effects at once, or uncheck individual effects like "Animate windows when minimizing and maximizing."

Check your battery health and replace it if it no longer holds a charge

Over time, all laptop batteries lose the ability to hold a full charge. A battery that is two to three years old may hold only 70 to 80 percent of its original capacity. You can check your battery's health on Windows by opening Command Prompt as administrator, typing "powercfg /batteryreport," and pressing Enter. This creates an HTML file showing your battery's design capacity versus its current capacity. If current capacity is below 50 percent of design capacity, the battery is degraded and replacing it will restore your battery life.

On Mac, hold Option and click the battery icon in the menu bar. Look at the "Condition" line — if it says "Normal," your battery is fine. If it says "Replace Soon" or "Replace Now," your battery is degraded. You can replace the battery yourself on some older MacBook models, but newer models require a visit to an Apple Store or authorized repair shop. Windows laptops vary widely — some have removable batteries you can buy online for thirty to eighty dollars, while others require professional replacement.

Frequently Asked Questions

Does closing the laptop lid save battery?

Yes. Closing the lid puts your laptop into sleep mode, which uses almost no battery. If you are stepping away for more than a few minutes, close the lid. Your laptop will wake up when ready when you open it again. Sleep mode is different from shutting down — your programs stay open and you do not lose any work.

Should I unplug my laptop when it reaches 100 percent?

Modern laptops stop charging once they hit 100 percent, so leaving it plugged in does not damage the battery. However, keeping a battery at 100 percent for long periods can slightly reduce its lifespan over years of use. If you use your laptop plugged in most of the time, some laptops let you set a charging limit — on Mac, go to System Settings > Battery and toggle "Optimized Battery Charging" on to cap charging at 80 percent.

Does using your laptop while it charges drain the battery faster?

No. When your laptop is plugged in, it draws power directly from the outlet, not from the battery. The battery only charges when the laptop is using less power than the charger is supplying. Using your laptop while charging does not drain the battery — it just slows down how fast the battery charges.

Can I leave my laptop plugged in overnight?

Yes, it is safe. Once your battery reaches 100 percent, your laptop stops charging and runs directly from the outlet. Leaving it plugged in overnight does not damage the battery or the laptop. If you plan to store your laptop for weeks or months without using it, unplug it and let the battery drain to about 50 percent before storing it in a cool, dry place.

What is the best temperature for my laptop battery?

Laptop batteries work best between 50 and 95 degrees Fahrenheit. Anything hotter slows charging and drains the battery faster. Anything colder reduces the battery's ability to deliver power. If your laptop feels hot to the touch, move it to a cooler location or use a cooling pad. If you are in a very cold environment, let your laptop warm up for a few minutes before using it on battery power.