Laptop battery draining fast on Windows 11? Find the cause and fix it

Step 1: See what is using your battery

1. Open Settings > System > Power & battery.
2. Select Battery usage.
3. Change the view to Last 24 hours or Last 7 days and sort by usage.

Look for apps you were not actively using, such as a game launcher, cloud sync app or a browser with many tabs. Close them, or select the three dots next to an app (where available) and choose Manage background productivity to stop it running in the background.

Step 2: Change the settings that matter most

Setting	Where to find it	What to choose
Screen brightness	Quick Settings (Win + A)	As low as is comfortable. The screen is often the biggest power user
Power mode	Settings > System > Power & battery > Power mode	Best power efficiency on battery
Energy saver	Settings > System > Power & battery > Energy saver	Turn on automatically at 30% or higher
Refresh rate	Settings > System > Display > Advanced display	60Hz on battery if your screen supports 120Hz or more
Keyboard backlight	Usually a function key	Off when not needed
Bluetooth	Quick Settings	Off if you are not using Bluetooth devices

Step 3: Tame startup apps

Many apps start with Windows and run all day.

1. Open Settings > Apps > Startup.
2. Turn off apps you do not need right away, such as music apps, game launchers and chat apps you rarely use.

Step 4: Check your battery’s health

Windows can create a detailed battery report.

1. Right-click Start and open Terminal (Admin).
2. Run:

powercfg /batteryreport

3. Windows saves a file called battery-report.html and shows where (usually in your user folder or C:\Windows\System32). Open it in your browser.

In the Installed batteries section, compare:

• Design capacity: what the battery held when new.
• Full charge capacity: what it holds now.

If full charge capacity is around 80% or less of the design capacity, the battery has worn noticeably. No setting will bring that capacity back. A replacement from the laptop maker or an authorized repair shop is the real fix.

Step 5: Update Windows, drivers and BIOS

Battery bugs are often fixed in updates.

• Run Settings > Windows Update > Check for updates, including optional driver updates.
• Use your laptop maker’s support app (such as Lenovo Vantage, HP Support Assistant, Dell SupportAssist, MyASUS or Acer Care Center) to update the BIOS and power drivers.

Step 6: Look for runaway processes

Press Ctrl + Shift + Esc to open Task Manager, select the Processes tab and sort by Power usage. An app stuck at “Very high” while you are not using it may be frozen. Select it and choose End task, then reinstall it if it keeps happening.

Warning signs that need a repair

Stop using the laptop on battery and contact the manufacturer if you notice:

• A swollen battery: the case bulges, the touchpad lifts or the lid will not close flat.
• The laptop gets very hot when idle.
• The battery percentage jumps suddenly, such as from 40% to 5%.

Swollen lithium-ion batteries can be a fire risk. Do not press on them or try to remove them yourself.

How to make your battery last longer

• If you are mostly plugged in, turn on your laptop’s charge limit (often 80%) in the maker’s app.
• Keep the laptop out of heat, such as a hot car or soft bedding that blocks vents.
• Use Best power efficiency mode when you do not need full speed.