Last reviewed 23 October 2026. This guide is for students and anyone on a Windows laptop who needs it to last through lectures, deadlines and power cuts. It gives 12 tips, each checked against Microsoft, Apple or a laptop maker's own documentation. We did not run battery tests, so we give no minute-by-minute gains; battery life depends on your model, battery age and what you run. Where a tip is our own advice and not in a vendor page, it says so.
Update, 23 October 2026: We cut the guide from 15 steps and about 3,400 words to 12 tips, and removed battery-life gains, prices and statistics we could not source.
Fastest wins: set Power mode to Best Power Efficiency, turn on Energy saver, lower the brightness and shorten the screen timeout. Then fix the habits that wear the battery out: heat and charging to 100% every day.
Menu paths below are for Windows 11 24H2 or later. Microsoft's battery saving tips list the different paths for Windows 10 and for Windows 11 24H1 and earlier. If a setting is missing, press the Windows key and type its name.
Quick wins (about 5 minutes)
1. Set Power mode to Best Power Efficiency. Go to Settings, System, Power & battery, Power mode. Microsoft says this reduces power use by limiting background activity, plugged in or not. Microsoft's battery saving tips note the option is not available on every PC.
2. Turn on Energy saver (called Battery saver on older builds). Settings, System, Power & battery, Energy saver. It dims the screen and limits background processes, and you can set a battery level at which it turns on. Microsoft's page does not state the default level, so check what your PC shows.
3. Lower brightness and use a dark theme. Settings, System, Display, Brightness. Microsoft also lists a dark theme and dark background under Personalization. Dell says dark mode helps especially on OLED screens. We cannot give a percentage that suits every screen; use the lowest level you can read comfortably indoors.
4. Shorten the screen and sleep timeouts on battery. Settings, System, Power & battery, Screen and sleep. Set "On battery power, turn off my screen after" and "put my device to sleep after" to shorter times.
5. Lower the refresh rate if your laptop offers it. Settings, System, Display, Advanced display, "Choose a refresh rate" (Microsoft's battery tips). Many budget laptops only have one option.
Stop the hidden drain
6. Check battery use per app. Settings, System, Power & battery, Battery usage, then "Battery usage per app." For an app you rarely use, open More options, then "Manage background activity," and change "Let this app run in the background" if the app allows it. Dell also suggests checking per-app use and closing unused apps. Microsoft does not list apps to disable, so decide from your own usage list; do not disable security or driver software.
7. Cut startup apps. Settings, Apps, Startup, then switch off apps you do not need at sign-in. Task Manager (Ctrl+Shift+Esc) shows a startup impact rating for each, as Microsoft's startup guide explains. We could not source a battery saving from this, but it reduces what runs in the background.
8. Close tabs and use your browser's energy settings. Microsoft says Edge's Energy saver and sleeping tabs reduce power use by limiting background activity and putting idle tabs to sleep. The settings are under System and performance. Close tabs you are not reading.
9. Turn off what you are not using. Switch off Wi-Fi and Bluetooth when working offline, or use Airplane mode (Settings, Network & internet, Airplane mode), as both Microsoft and Dell advise. Dell also says to disconnect external devices such as USB drives and mice when not in use.
Protect the battery for years
10. Keep the charge between roughly 20% and 80% when you can. Microsoft's battery care page recommends this range and says to avoid frequent deep discharges. If your laptop supports Smart charging, a heart appears on the battery icon, and per Microsoft the laptop may not charge to 100%. Turn it off when you expect a long time without power. Makers offer their own limits:
| Maker | Tool and setting | What the maker says |
|---|---|---|
| ASUS | MyASUS, Battery Care Mode | [Balanced stops above 80%; Maximum Lifespan stops above 60%](https://www.asus.com/support/faq/1032726/) |
| Dell | Dell Power Manager, Primarily AC Use or Custom | [Primarily AC Use caps charge below 100%](https://www.dell.com/support/kbdoc/en-us/000123091/how-to-improve-the-performance-of-a-dell-laptop-battery); Custom lets you set start and stop levels |
| Lenovo | Conservation mode (Legion Slim 5 guide) | [Limits charge to 75% to 80%](https://download.lenovo.com/pccbbs/pubs/legion_slim_5/html_en/EN/common_topics_2022-8_RTM_updated/intro_battery_mode_conservation.html) on that model; other models may differ (unverified) |
| HP | Battery Health Manager | A limit of 80% is reported on some models (unconfirmed; check HP's page for your model) |
During a power cut, do not hold back: charge to 100% if you need the hours. The 80% limit is for desks and daily use.
11. Keep it cool. Microsoft says to avoid using or charging the device at high temperatures because heat reduces capacity permanently. Apple's battery page says to keep devices out of ambient temperatures above 35 C (95 F) and to remove cases that trap heat while charging. Using the laptop on a hard, flat surface and keeping the vents free of dust also helps.
12. Run a battery report every few months. Open Command Prompt as administrator and run `powercfg /batteryreport`. Windows saves an HTML file and shows its location; Microsoft's page lists Installed battery, Recent usage and Battery usage sections. Dell's page does not mention administrator rights; Microsoft's does. Compare design capacity with full charge capacity to see how much capacity has gone. Neither Microsoft nor Dell gives a percentage at which to replace the battery, so treat a large gap, plus a real drop in runtime, as the cue to consider a replacement from an authorised seller.
Common errors and fixes
- Power mode or Energy saver is missing. Microsoft says Power mode is not on every PC. Use the older Battery saver path in Settings, System, Battery on Windows 10, or check your manufacturer's app.
- Battery stays at 80% or below after setting a limit. That is expected. ASUS says the limit resets at startup until Windows loads. If the battery was already above the limit, ASUS says to unplug it, let it fall below the threshold and plug in again.
- The battery report command fails. Run Command Prompt as administrator, as Microsoft instructs. Dell's version runs from a normal command prompt and saves `battery-report.html` in your user folder.
- The battery swells or the case bulges. Microsoft says to stop using the device immediately and not to press or puncture the battery.
What this means during a power cut
Charge fully when power is back, because you may need every minute later. When it goes out, apply tips 1 to 4 and 9 first, close heavy tabs, and work offline. A power bank can only charge a laptop if it supports laptop-level output; check the wattage on your laptop's charger and on the bank.
FAQ
Does Energy saver slow my laptop? Microsoft says it limits background activity and dims the screen, so some tasks may feel slower. Turn it off when you need full speed.
Should I keep my laptop plugged in all day? Microsoft recommends keeping the charge roughly between 20% and 80%. Use Smart charging or your maker's limit if available.
Do these tips work on a MacBook? Tips 3, 9 and 11 apply broadly; tips 10 and 12 are Windows-specific. Apple's page says MacBooks work best at ambient temperatures of 10 to 35 C and describes Optimized Battery Charging, which may hold charge below 100% until you need it.
Can I check this on Windows 10? Yes, but the menus differ. Microsoft's battery saving tips lists Windows 10 paths.
Sources: Microsoft Support (battery saving tips, power settings in Windows 11, caring for your battery, Smart charging, startup applications, Edge performance features), Apple Support (maximizing battery performance), Dell, ASUS and Lenovo support pages linked above.
