# Tips to extend laptop battery life, on each charge and for years > Make a laptop battery last longer per charge and for more years: power settings, charge limits, heat, and battery health checks on Windows and Mac. - URL: https://computese.com/how-to-extend-your-laptops-battery-life/ - Author: Duong Quan Nguyen, CEO, Computese - Published: 2024-08-15 - Updated: 2026-09-25 - Topics: IT support ## In short - Battery life means two things: hours per charge, set by the screen, the power mode and background apps, and years of service, set by heat and how long the battery sits fully charged. - For more hours per charge, choose Best power efficiency on Windows or Low Power Mode on a Mac, lower brightness and refresh rate, and check battery usage per app to stop what runs in the background. - For more years, turn on a charge limit if the laptop lives on its charger (Smart charging, macOS Charge Limit, Lenovo Conservation mode, Dell Primarily AC Use, HP Battery Health Manager, ASUS Battery Care Mode) and keep it cool. - Check health with powercfg /batteryreport on Windows or Battery Health on a Mac, and replace the battery when runtime no longer covers your day, macOS says Service Recommended, or it swells. To extend laptop battery life, cut what drains each charge and slow what ages the cells. For more hours, use the most efficient power mode, dim the screen and limit background apps. For more years, avoid sitting at 100%: turn on a charge limit if the laptop lives on its charger, and keep it cool. Those are two different problems with different fixes, and it helps to keep them apart. This guide covers the settings that stretch a charge on Windows 11 and macOS, why lithium-ion batteries wear out, the charge-limit tools from Microsoft, Apple, Lenovo, Dell, HP and ASUS that slow it down, how to read the Windows battery report and a Mac's battery health, and when a battery is worth replacing. Menu names and versions are as of September 2026. ## Battery life means two different things People use "battery life" for two separate measures: - **Runtime** is how long the laptop runs on one charge. It depends on how much power the hardware draws: the screen, the processor, the radios and whatever apps are doing in the background. Settings change it immediately. - **Lifespan** is how many years the battery keeps enough capacity to be useful. Every lithium-ion battery holds less charge as it chemically ages, and Apple describes that chemical age as the result of the battery's temperature history and charging pattern, not of time alone. The two can pull against each other. Charging to 100% every day gives the longest runtime today and ages the cells faster; a charge limit gives up a little runtime to slow that aging. The right balance depends on where the laptop spends its day: on a desk next to a charger, or in a bag. | | Runtime (hours per charge) | Lifespan (years of useful capacity) | | ------------------ | ------------------------------------------------------- | --------------------------------------------------- | | What sets it | Screen, power mode, background apps, radios | Heat, time spent fully charged, depth of each cycle | | What you change | Power mode, brightness, refresh rate, app activity | Charge limit, temperature, charge level for storage | | Where you check it | Battery usage per app (Windows), Battery settings (Mac) | Windows battery report, Battery Health (Mac) | ## How to make a Windows 11 laptop battery last longer on each charge Windows 11 keeps most battery settings in **Settings > System > Power & battery**. Work through them in this order, since the first two change the most for the least effort: 1. **Pick a power mode.** Under **Power mode**, choose **Best power efficiency** for **On battery**. Windows keeps a separate choice for **Plugged in**, so the laptop can run at full speed on the charger and save power away from it. [Microsoft describes Best power efficiency](https://support.microsoft.com/en-us/windows/experience/power-battery/power-settings-in-windows-11) as reducing power use by limiting background activity. If the setting is unavailable, [a custom power plan is selected](https://support.microsoft.com/en-us/windows/change-the-power-mode-for-your-windows-pc-c2aff038-22c9-f46d-5ca0-78696fdf2de8): open Control Panel > System and Security > Power Options and choose **Balanced** to bring it back. 2. **Use energy saver.** On Windows 11 version 24H2 and later, [energy saver takes the place of battery saver](https://support.microsoft.com/en-us/windows/experience/power-battery/battery-saving-tips-for-windows). Choose the battery level at which it turns on by itself, or turn on **Always use energy saver**, and switch on **Lower screen brightness when using energy saver**. It is also a quick setting behind the battery icon on the taskbar. 3. **Open Energy recommendations.** [This page](https://support.microsoft.com/en-us/windows/experience/power-battery/learn-more-about-energy-recommendations) lists the settings on your laptop that use more power than they need, such as brightness, a screen saver or long sleep timers, and offers **Apply all**. Depending on the hardware, it can set the screen to turn off and the laptop to sleep after 3 minutes (10 on some systems), stop USB devices when the screen is off, adjust brightness and contrast to the content shown, and, on laptops with a presence sensor, dim the screen when you look away and sleep when you leave. 4. **Find the apps that drain it.** Expand **Battery usage** and look at **Battery usage per app**. For an app that uses a lot of battery in the background, select **More options > Manage background activity** and change **Let this app run in the background** from **Always** to **Power optimized** ([Microsoft's recommendation](https://support.microsoft.com/en-us/windows/experience/performance-optimization/manage-background-activity-for-apps-in-windows)) or **Never**. Only apps that support background control show the option; quit the others when you are not using them. 5. **Watch live power draw.** In Task Manager (Ctrl+Shift+Esc), right-click the column header and add **Power usage** and **Power usage trend** to see which running processes draw the most right now. Check what a process does before you end it. ### Display settings that save the most [Dell calls the display](https://www.dell.com/support/kbdoc/en-us/000123091/how-to-improve-the-performance-of-a-dell-laptop-battery) one of the largest power draws in a laptop, so it is where settings pay off first: - **Brightness.** Lower it under **Settings > System > Display**. The automatic options that Energy recommendations can switch on, adaptive brightness and brightness and contrast adjusted to the content shown, save power by themselves; turn the content-based one off only if the changes distract you or you need accurate colour for photo and video work. - **Refresh rate.** A higher refresh rate gives smoother motion and uses more power. Under **Display > Advanced display**, choose a dynamic refresh rate (DRR) if the screen offers one, which lowers the rate during static tasks, or pick a lower fixed rate. - **Dark mode.** Choose Dark under **Settings > Personalization > Colors**. Microsoft notes the saving is largest on OLED displays. - **Graphics per app.** Under **Display > Graphics**, set a demanding app to **Power saving**. - **Video.** Under **Settings > Apps > Video playback**, choose **Optimize for battery life**, and optionally play video at a lower resolution on battery. ### Sleep and hibernate Shorter timeouts under **Screen, sleep & hibernate timeouts** save the power a laptop spends doing nothing. [Microsoft has lowered the defaults](https://support.microsoft.com/en-us/windows/experience/power-battery/power-settings-in-windows-11): a modern standby laptop on battery now turns its screen off, and sleeps, after 3 minutes. [Hibernate uses less power than sleep](https://support.microsoft.com/en-us/windows/experience/power-battery/shut-down-sleep-or-hibernate-your-pc), and Microsoft suggests it when you will not use the laptop for a long stretch and cannot charge it; not every PC offers it. Dell's advice is simpler still: shut the laptop down before you put it in a bag or another enclosed space. Many of the same settings also decide [how fast the laptop feels](https://computese.com/why-is-your-computer-slow-and-how-to-fix/); our guide to [optimizing PC performance](https://computese.com/how-to-optimize-pc-performance/) covers that side. Keep Windows, drivers and the firmware current too: [Dell lists](https://www.dell.com/support/kbdoc/en-us/000130117/how-to-generate-battery-report-using-the-powercfg-command) BIOS, chipset and power management driver updates among the first steps when troubleshooting a battery. Our guide to [setting up Windows on a new computer](https://computese.com/how-to-set-up-windows-for-a-new-computer/) shows where Windows Update and optional driver updates live. ## How to make a MacBook battery last longer on each charge macOS keeps its battery settings in **System Settings > Battery**: 1. **Turn on Low Power Mode.** [It reduces energy use](https://support.apple.com/en-us/101613) to increase battery life. The **Energy Mode** menu lets you choose Low Power, Automatic or High Power separately for **On battery** and **On power adapter**; Automatic is the default. From macOS Sequoia 15.1, you can also switch modes in Control Center. 2. **Find the apps that use the most energy.** [In Activity Monitor](https://support.apple.com/guide/activity-monitor/view-energy-consumption-actmntr43697/mac), the **Energy** tab shows each app's **Energy Impact**, a relative measure of what it uses now, and on laptops **12 hr Power**, its average over the last 12 hours. The **Preventing Sleep** column shows apps that keep the Mac awake. 3. **Read the usage history.** [Battery settings](https://support.apple.com/guide/mac-help/change-battery-settings-mchlfc3b7879/mac) chart the battery level and screen-on time for the last 24 hours, and energy usage for the last 10 days, so you can connect a short day to what you were doing. 4. **Turn on the display and video options.** Battery settings also offer **Slightly dim the display on battery**, and **Optimize video streaming while on battery**, which plays HDR video in standard dynamic range. Apple also advises [keeping a MacBook on the latest version of macOS](https://www.apple.com/batteries/maximizing-performance/). ## Habits that save battery on any laptop Some of the drain has nothing to do with the operating system: - **Keyboard backlight and accessories.** Dell lists the keyboard backlight and connected external devices among the settings that affect runtime. Turn the backlight down in daylight, and unplug USB drives and other devices you are not using. - **Radios.** Turn off Wi-Fi and Bluetooth when you do not need them, or switch on airplane mode when you are working offline. - **The right charger.** Use the adapter made for the laptop or one rated for its wattage: Apple warns that an adapter below the wattage a Mac needs may charge it slowly or unreliably, and Dell advises against third-party adapters and batteries. - **Cold.** In a very cold place the battery runs down faster, but Apple notes that this is temporary: runtime returns once the battery warms back to its normal range. Heat is different, as the next sections explain. ## Why laptop batteries wear out Lithium-ion cells lose capacity in two ways. **Cycle aging** comes from charging and discharging. In a [multi-year Sandia National Laboratories study](https://iopscience.iop.org/article/10.1149/1945-7111/abae37) of commercial lithium-ion cells, published in 2020, capacity faded faster as the depth of discharge increased, for every cell in the study. Running the battery from full to empty over and over wears it more than shallow top-ups do. **Calendar aging** happens with time, even when the battery sits unused. The main mechanism is the slow growth of a passivation layer on the electrodes, the solid electrolyte interphase (SEI), which consumes lithium that would otherwise carry charge. A high state of charge and a high temperature both speed it up, and a [2016 study of calendar aging](https://iopscience.iop.org/article/10.1149/2.0411609jes) concluded that high storage states of charge should be avoided to maximize battery life. The Sandia paper, reviewing earlier calendar aging studies, reports the same pattern across chemistries: capacity loss during storage rose with state of charge, was especially fast for NMC and NCA cells held at 100%, and fell at lower temperatures. So a battery ages fastest when it is kept full, kept hot, and run flat again and again. The vendors' advice follows from that. [Microsoft suggests](https://support.microsoft.com/en-us/windows/experience/power-battery/caring-for-your-battery-in-windows) keeping the level roughly between 20% and 80% when you can and avoiding frequent deep discharges, and Apple, Microsoft and the laptop makers all ship settings that stop charging short of full. ### What charge cycles and cycle count mean A charge cycle is using energy equal to the battery's whole capacity, but not necessarily in one go. [Apple's example](https://support.apple.com/en-us/102888): use half the charge one day, recharge fully, do the same the next day, and that counts as one cycle, not two. The cycle count is the number completed so far. Apple rates the batteries in current Mac laptops for a maximum of 1,000 cycles, at which point a battery is designed to keep up to 80% of its original capacity. Cycles are only half the story. Calendar aging continues whether or not you cycle the battery, so measured capacity is the better guide to its health; the health checks further down show where to find it. ## How to extend the life of a laptop battery with a charge limit If the laptop spends most of its days on a desk or a dock, a charge limit is the most useful setting for its lifespan. [Microsoft notes](https://support.microsoft.com/en-us/windows/experience/power-battery/use-smart-charging-in-windows) that keeping the battery at 100% all the time can make it deteriorate faster, and that with Smart charging you no longer need to unplug the laptop to avoid that. A charge limit stops charging below full and holds the battery there while the charger stays connected. When the level drops, charging resumes and stops at the limit again; on a Mac, [it resumes once the level falls more than 5% below the limit](https://support.apple.com/en-us/102338). When you need the full capacity for a trip, most tools offer a one-off full charge: **Charge to Full Now** on a Mac, **Charge to 100%** in the [Surface app](https://support.microsoft.com/en-us/surface/battery/smart-charging-on-surface), or **Instant Full-Charge Mode** in [MyASUS](https://www.asus.com/support/faq/1045651/), which returns to the limit after 24 hours. ![A laptop on a desk is plugged into its charger. A cut-away battery inside is filled up to an orange line below the top, the space above stays empty, and the charging arrow stops at the line.](https://computese.com/images/blog/how-to-extend-your-laptops-battery-life/charge-limit.c1e9614f8c-1536.webp) *Stopping short of full is the whole trick: the battery spends its plugged-in days at a level that ages it more slowly.* Where to find the setting, as of September 2026: | Laptop | Where | Setting | Charges to | | ------------------------------------------------- | --------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- | ----------------------------------------------- | | Windows 11, where the maker enables it | Turned on by the maker; a heart on the battery icon | Smart charging | A lower level the maker sets | | Microsoft Surface | Surface app; UEFI for Battery Limit | Smart charging; Battery Limit for always-on devices | 80%; 50% | | Mac with Apple silicon, macOS Tahoe 26.4 or later | System Settings > Battery > Charging | Charge Limit | Your choice, 80% to 100% | | Mac, macOS Big Sur 11 or later | System Settings > Battery > Charging | Optimized Battery Charging | Holds at 80% until it predicts you need full | | Lenovo IdeaPad and other Lenovo PCs | [Lenovo Vantage](https://pcsupport.lenovo.com/us/en/solutions/ht103159) > Device > My Device Settings > Battery | Conservation mode | 55% to 60% | | Lenovo ThinkPad | Lenovo Vantage, same path | Custom battery charge threshold | Your thresholds | | Dell | Dell Power Manager; Dell Optimizer on commercial models | Primarily AC Use, Adaptive or Custom | Below 100%; learned from your routine; your own | | HP business notebooks, G7 series and later | BIOS setup | HP Battery Health Manager: Maximize Battery Health Management | 80% of design capacity | | ASUS | MyASUS | Battery Care Mode (Battery Health Charging) | 80%; 60%, 80% or 100% on older models | Which option to choose depends on how the laptop is used: - **Plugged in nearly all day** (a desk, a dock, a reception or point-of-sale laptop): use the lowest limit available. [HP recommends](https://support.hp.com/us-en/document/ish_4449597-3519507-16) Maximize Battery Health Management for notebooks connected to power all day, Dell's Primarily AC Use is meant for the same case, and Microsoft's [Surface Battery Limit](https://learn.microsoft.com/en-us/surface/battery-limit), which stops at 50%, is intended for devices that are always connected, such as kiosks. - **Moving between desk and meetings**: an adaptive or balanced option, such as Optimized Battery Charging on a Mac, Dell's Adaptive mode, which optimizes charging from your usage pattern, or HP's default, Let HP Manage My Battery Health, which HP recommends for laptops used both on power and on battery. ASUS suggests its 80% setting for laptops used on battery in meetings. - **Mostly on battery**: leave the limit off, or turn it off before you travel. Microsoft suggests turning Smart charging off when you travel or expect to work far from an outlet. Intel-based Mac laptops with Thunderbolt 3 ports have a simpler version, [battery health management](https://support.apple.com/en-us/102588), which may temporarily reduce the maximum charge based on temperature history and charging patterns; it is the **Manage battery longevity** option in Battery Health. > [!NOTE] > An occasional full charge is normal. Macs charge to 100% now and then to keep their battery-level estimates accurate, and ASUS resets the limit to 100% at every start-up until Windows has loaded. On HP products released in 2025 and earlier, the taskbar shows 100% even while Maximize Battery Health Management holds the battery at 80% of design capacity. ## Keep the battery cool Heat is the other half of battery wear, and the damage it does is permanent. [Apple rates MacBooks](https://www.apple.com/batteries/maximizing-performance/) to work best at ambient temperatures of 10 to 35 °C (50 to 95 °F), calls 16 to 22 °C the ideal comfort zone, and warns that ambient temperatures above 35 °C can permanently damage battery capacity. Charging in that heat damages it further, and even storing a battery somewhere hot can harm it irreversibly. Microsoft's advice for Windows laptops is the same: try not to use or charge the laptop at high temperatures. In practice, heat builds up when a laptop charges or works hard with nowhere for the warm air to go: on a bed or cushion that covers the vents, in a bag, or left in a car in summer. Give it a hard surface while it charges, and if it gets hot while charging inside a case, Apple suggests taking it out of the case first. ![Two identical laptops, one on a hard desk and one sunk into a soft cushion. Cutaways below show the desk laptop's battery cool and the cushion laptop's battery giving off orange heat waves.](https://computese.com/images/blog/how-to-extend-your-laptops-battery-life/heat.1ef3cbd47c-1536.webp) *Heat damage does not come back, and charging in a hot, enclosed space adds to it.* ## How to store a laptop you will not use for months For a laptop going into a drawer, the charge level and the temperature decide how much capacity it has when it comes out: 1. **Charge it to about half.** [Apple recommends around 50%](https://www.apple.com/batteries/maximizing-performance/), and [Microsoft 40 to 60%](https://support.microsoft.com/en-us/windows/experience/power-battery/caring-for-your-battery-in-windows). A battery stored completely empty can fall into a deep discharge state in which it no longer holds a charge; one stored full for a long time loses capacity. 2. **Shut it down**, rather than leaving it asleep. 3. **Keep it cool and dry.** Apple specifies a moisture-free place below 32 °C (90 °F). 4. **Top it up.** If storage lasts longer than six months, Apple recommends charging it back to 50% every six months, and Microsoft suggests checking the level periodically. ## Check battery health on Windows with the battery report Windows has a built-in battery report that shows how much capacity your battery has lost. Generate it from Command Prompt ([Microsoft's steps](https://support.microsoft.com/en-us/windows/experience/power-battery/caring-for-your-battery-in-windows) open it with **Run as administrator**): ```bat powercfg /batteryreport ``` The command saves an HTML file and prints its location, usually your user folder (`C:\Users\\battery-report.html`). Open it in a browser. Two options from [Microsoft's reference](https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/powercfg-command-line-options) help: `/output` chooses where the file goes, and `/duration` sets how many days of history to analyze. ```bat powercfg /batteryreport /output "%USERPROFILE%\Desktop\battery-report.html" powercfg /batteryreport /duration 7 ``` Start with **Installed batteries**, which lists the design capacity, what the battery held when new, and the full charge capacity, what it holds now. The ratio between them is the wear. [Dell treats a full charge capacity below 40% of design capacity](https://www.dell.com/support/kbdoc/en-us/000130117/how-to-generate-battery-report-using-the-powercfg-command) as significantly degraded, time to replace the battery. The figure moves with temperature and recent use, so compare several reports over time rather than reading too much into one. ![A laptop screen shows a report with a falling line chart. Beside it, a dashed outline marks a battery's size when new, a smaller solid battery sits inside it, and the orange band between them is the lost capacity.](https://computese.com/images/blog/how-to-extend-your-laptops-battery-life/capacity.4d1ead8c42-1536.webp) *The gap between the two capacities is the battery's wear, and the one number worth tracking over time.* The rest of the report is useful for runtime problems: - **Recent usage** shows periods of unexpectedly fast drain, and times when an app kept the laptop from sleeping. - **Battery capacity history** shows how the full charge capacity has changed. - **Battery life estimates** compare expected runtime with what you actually get. Laptop makers' own tools rate battery health too. Dell, for example, checks it in Dell SupportAssist, and lists a health status of Fair or Poor among the signs that a replacement is due. ## Check battery health and cycle count on a Mac On a Mac laptop, open **System Settings > Battery** and look at **Battery Health**: - **Normal** means the battery is working as it should. - [**Service Recommended**](https://support.apple.com/en-us/108376) means it holds less charge than when it was new, or is not working normally. The Mac is still safe to use; the battery is due for service when the lower capacity gets in your way. Click the info button next to the condition to see [**Maximum Capacity**](https://support.apple.com/en-us/102589), the battery's capacity relative to when it was new. Expect it to read slightly under 100% even on a new Mac, and to change after a macOS update, when the Mac may recalibrate it. On older Macs or macOS versions without Battery Health, hold Option and click the battery icon in the menu bar; the status may read Replace Soon, Replace Now or Service Battery. For the cycle count, hold Option, choose **Apple menu > System Information**, and select **Power** under Hardware; the count is under **Battery Information**. Apple advises relying on what macOS reports, since third-party battery apps may not be accurate. ## When to replace a laptop battery A battery rarely fails on a particular day; it fades. Replace it when one of these is true: - **Runtime no longer covers your working day**, even with efficient settings. [Dell lists a drop](https://www.dell.com/support/kbdoc/en-us/000124397/how-to-check-battery-health-status-on-dell-laptops) to less than 50% of the original capacity among the signs. - **The health check says so.** On a Mac, that is Service Recommended, or a cycle count at the model's maximum: Apple recommends replacing the battery then for the best performance. On Windows, it is a full charge capacity far below design capacity in the battery report, or a Fair or Poor rating in the maker's tool. - **The laptop shuts down unexpectedly** while the battery still shows charge remaining, which Dell lists among the signs. - **The battery swells.** This one is not a judgement call. > [!WARNING] > If the battery swells, stop using the laptop immediately and unplug the charger. Do not press on it, puncture it or try to take it apart, keep it away from heat, and have the battery replaced by the manufacturer or an authorized service provider. Check the warranty before you pay. [Apple's one-year limited warranty](https://support.apple.com/en-us/108376) covers a defective battery, and with AppleCare, Apple replaces a battery that keeps less than 80% of its original capacity at no charge. Dell covers a laptop battery for one year, or for three years where the battery's description in the laptop's specifications says 3 Years Limited Hardware Warranty or Long Cycle Life (LL). If the battery is built in, replacing it is a repair job rather than a swap. Apple directs Mac owners to an Apple Store, an Apple Authorized Service Provider or an Independent Repair Provider using genuine Apple parts, and offers Self Service Repair for some Mac models from 2020 onward in certain countries. Dell sells genuine batteries through the **Parts & Repairs** section of each laptop's support page. For a business with a fleet of laptops, battery health belongs in the same place as the rest of the hardware records. Our [IT support service](https://computese.com/services/it-support/) keeps an asset register with advice on what to replace and when, and manages laptops from one console with Microsoft Intune or Jamf. ## Key terms - **Battery runtime**: How long a laptop runs on one full charge. It depends on what the hardware draws: the screen, the processor, the radios and the apps working in the background. - **Battery lifespan**: How long the battery keeps enough capacity to be useful. It ends gradually, as the capacity falls with chemical aging, rather than on a set date. - **Charge cycle**: Using energy equal to the battery's full capacity, in one charge or several partial ones. Apple counts half a charge used on each of two days as one cycle. - **State of charge (SoC)**: How full the battery is, as a percentage of what it can currently hold. Lithium-ion cells kept at a high state of charge age faster. - **Depth of discharge (DoD)**: How much of the battery's capacity one cycle uses before it is recharged. Deeper cycles wear lithium-ion cells faster than shallow ones. - **Calendar aging**: Capacity a battery loses with time alone, whether or not it is used. High state of charge and high temperature both speed it up. - **Design capacity and full charge capacity**: What the battery held when it was new, and what it holds at a full charge today. The Windows battery report lists both, and the gap between them is the wear. - **Charge limit**: A setting that stops charging below 100% while the charger stays connected, to slow aging. Makers call it Smart charging, Conservation mode, Battery Care Mode or a charge threshold. - **Energy saver**: The Windows 11 mode, from version 24H2, that limits background activity and can lower screen brightness to stretch a charge. It can turn on by itself at a battery level you choose. - **Low Power Mode**: The macOS energy mode that reduces energy use to increase battery life. It can be set separately for battery power and the power adapter. ## Common questions ### Is it bad to leave a laptop plugged in all the time? Being plugged in is not the problem; sitting at 100% for days is. Microsoft notes that keeping the battery charged to 100% all the time can make it deteriorate faster. If the laptop lives on a desk or dock, turn on its charge limit: Smart charging where the maker offers it, Charge Limit or Optimized Battery Charging on a Mac, Conservation mode on Lenovo, Primarily AC Use on Dell, Maximize Battery Health Management on HP business models, or Battery Care Mode on ASUS. ### Should I charge my laptop battery to 100%? Charge to 100% when you need the full runtime, such as before a flight or a day away from outlets. The rest of the time, a limit around 80% slows aging: Microsoft suggests keeping the level roughly between 20% and 80% when you can. Mac laptops still charge to 100% now and then, to keep their battery-level estimates accurate. ### How long does a laptop battery last before it needs replacing? It depends on heat, charging habits and use more than on age alone. Apple rates current Mac laptops for 1,000 charge cycles, at which point the battery is designed to keep up to 80% of its original capacity, and Dell notes that most users notice shorter battery life after 18 to 24 months. Check the measured capacity rather than guessing from the calendar. ### Why does my laptop stop charging at 60% or 80%? A charge limit is on. Lenovo's Conservation mode stops at 55% to 60%, ASUS Battery Care Mode at 80% (or 60% in the maximum lifespan mode on older models), and HP's Maximize Battery Health Management at 80% of design capacity; on a Mac, the battery menu shows Charging On Hold or that it is charged to its limit. Turn the setting off, or use its one-off full charge, when you need every hour. ### Should I let my laptop battery drain to 0% to calibrate it? Not as a habit: deep discharges wear lithium-ion cells faster, and Microsoft advises avoiding frequent ones. A full discharge and recharge is a calibration step for specific cases, such as HP's advice after switching to Minimize Battery Health Management. Macs keep their estimates accurate on their own by occasionally charging to 100%. ### How do I check my laptop's battery health? On Windows, run powercfg /batteryreport in Command Prompt and compare Design Capacity with Full Charge Capacity in the report. On a Mac, open System Settings > Battery and look at Battery Health, where the info button shows Maximum Capacity; the cycle count is in System Information, under Power. ## Sources 1. [Change the power mode for your Windows PC](https://support.microsoft.com/en-us/windows/change-the-power-mode-for-your-windows-pc-c2aff038-22c9-f46d-5ca0-78696fdf2de8), Microsoft Support 2. [Power settings in Windows 11](https://support.microsoft.com/en-us/windows/experience/power-battery/power-settings-in-windows-11), Microsoft Support 3. [Battery saving tips for Windows](https://support.microsoft.com/en-us/windows/experience/power-battery/battery-saving-tips-for-windows), Microsoft Support 4. [Learn more about energy recommendations](https://support.microsoft.com/en-us/windows/experience/power-battery/learn-more-about-energy-recommendations), Microsoft Support 5. [Manage background activity for apps in Windows](https://support.microsoft.com/en-us/windows/experience/performance-optimization/manage-background-activity-for-apps-in-windows), Microsoft Support 6. [Shut down, sleep, or hibernate your PC](https://support.microsoft.com/en-us/windows/experience/power-battery/shut-down-sleep-or-hibernate-your-pc), Microsoft Support 7. [How to Improve the Performance of a Dell Laptop Battery](https://www.dell.com/support/kbdoc/en-us/000123091/how-to-improve-the-performance-of-a-dell-laptop-battery), Dell Technologies 8. [About Power Modes on your Mac](https://support.apple.com/en-us/101613), Apple Support 9. [Change Battery settings on a Mac laptop](https://support.apple.com/guide/mac-help/change-battery-settings-mchlfc3b7879/mac), Apple (macOS User Guide) 10. [View energy consumption in Activity Monitor on Mac](https://support.apple.com/guide/activity-monitor/view-energy-consumption-actmntr43697/mac), Apple (Activity Monitor User Guide) 11. [Batteries: Maximizing Performance](https://www.apple.com/batteries/maximizing-performance/), Apple 12. [Calendar Aging of Lithium-Ion Batteries: I. Impact of the Graphite Anode on Capacity Fade (Keil et al., 2016)](https://iopscience.iop.org/article/10.1149/2.0411609jes), Journal of The Electrochemical Society 13. [Degradation of Commercial Lithium-Ion Cells as a Function of Chemistry and Cycling Conditions (Preger et al., 2020)](https://iopscience.iop.org/article/10.1149/1945-7111/abae37), Journal of The Electrochemical Society (Sandia National Laboratories) 14. [Caring for your battery in Windows](https://support.microsoft.com/en-us/windows/experience/power-battery/caring-for-your-battery-in-windows), Microsoft Support 15. [Determine battery cycle count for Mac laptops](https://support.apple.com/en-us/102888), Apple Support 16. [Use Smart charging in Windows](https://support.microsoft.com/en-us/windows/experience/power-battery/use-smart-charging-in-windows), Microsoft Support 17. [About Optimized Battery Charging and Charge Limit on Mac](https://support.apple.com/en-us/102338), Apple Support 18. [Smart charging on Surface](https://support.microsoft.com/en-us/surface/battery/smart-charging-on-surface), Microsoft Support 19. [Surface Battery Limit setting](https://learn.microsoft.com/en-us/surface/battery-limit), Microsoft Learn 20. [About battery health management in Intel-based Mac laptops](https://support.apple.com/en-us/102588), Apple Support 21. [Battery not charging, stops at 60% (ideapad)](https://pcsupport.lenovo.com/us/en/solutions/ht103159), Lenovo Support 22. [HP Business Notebook PCs: HP Battery Health Manager](https://support.hp.com/us-en/document/ish_4449597-3519507-16), HP Support 23. [MyASUS: Device Settings](https://www.asus.com/support/faq/1045651/), ASUS Support 24. [Powercfg command-line options](https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/powercfg-command-line-options), Microsoft Learn 25. [How to Generate a Battery Report Using the POWERCFG Command](https://www.dell.com/support/kbdoc/en-us/000130117/how-to-generate-battery-report-using-the-powercfg-command), Dell Technologies 26. [About battery health management in Mac laptops with Apple silicon](https://support.apple.com/en-us/102589), Apple Support 27. [If you see battery 'Service Recommended' on your Mac laptop](https://support.apple.com/en-us/108376), Apple Support 28. [How to Check Battery Health Status on Dell Laptops](https://www.dell.com/support/kbdoc/en-us/000124397/how-to-check-battery-health-status-on-dell-laptops), Dell Technologies