A laptop that is plugged in but not charging is very often not broken at all: if the charge stops at a round figure like 80% or 60% and stays there, a battery-care limit — Windows Smart charging, or your laptop maker’s own battery health setting — is deliberately holding the charge below full to slow battery wear, and the laptop will run happily on mains power at that level indefinitely. If instead the laptop shows plugged in and not charging at any percentage, or does not recognise the charger at all, work through the physical checks first — a different wall outlet, the original charger with its cable firmly seated, and any damage to the cable or port — then restart the laptop, reinstall the battery driver in Device Manager, and run a battery report to see whether the battery itself has worn out. The percentage it stops at is the best clue you have, so start there.

It stops at 80% or 60%: a charge limit is doing its job

Lithium-ion batteries age faster when they sit at 100% charge, so makers cap the charge on machines that live on a desk. Microsoft’s Smart charging page explains the Windows version directly: some manufacturers turn Smart charging on in Windows 11, the battery is then set to a lower level that is better for it, and the device may not charge to 100% at all. The tell-tale sign is a small heart on the battery icon — in the taskbar and in Power & battery settings. Hover over the icon and it reads “Fully Smart charged,” which Microsoft says means the battery is not charging even though the device is still plugged in, and that this is intentional.

On a Surface, Microsoft’s Smart charging on Surface page gives the numbers: Smart charging is always active, turns on by itself when the device has been plugged in for long periods or used at high temperatures, and limits the maximum charge to 80%. It pauses by itself when you run the battery below 20% or use the battery often. When you genuinely need a full charge — before a trip, say — supported Surface models let you choose Charge to 100% in the Surface app under Battery & charging; Microsoft advises doing it several hours before you need it, and the limit returns afterwards. Microsoft also documents a separate, stricter Battery Limit that stops at 50%, aimed at devices that stay plugged in permanently.

Other makers ship the same idea under their own names and in their own apps — Lenovo’s Conservation Mode, ASUS Battery Health Charging, and HP’s Battery Health Manager are the ones most often named in the makers’ own support material — with caps typically at 80% or 60% depending on the mode chosen. Where the setting lives, what it is called and which percentages it offers differ by brand and model, and there is no charge-limit control inside Windows Settings itself: Microsoft’s own instruction is to visit your device manufacturer’s website for how Smart charging works and how to change it on your device. So the honest path is: open your maker’s battery or power app if one is installed, look for a battery health, conservation or charge-limit setting, and check your exact model’s support page if you cannot find one. If the laptop spends its life plugged in, leave the limit on — it is protecting the battery. Turn it off, or pause it, when you need full runtime away from a socket.

One related behaviour confuses people: a battery already near full may not start charging the moment you plug in. Makers allow the charge to fall a few percent before topping up, rather than micro-charging constantly. A laptop sitting at 95% on mains power, not charging, is behaving normally.

It will not charge at all: check the power path first

If the percentage never moves whatever it starts at, suspect the power reaching the laptop before you suspect the battery. Microsoft’s Surface battery troubleshooting is written for Surface, but its first checks apply to any laptop, because they are about power delivery rather than software:

  • Try a different wall outlet, and plug the charger directly into the wall rather than through a strip or extension while you test.
  • Check every connection is secure — wall to charger, charger to cable if it detaches, cable to laptop. A USB-C plug that is almost in is a common silent failure.
  • Use the charger made for the laptop, or one that meets its charging requirements. A low-wattage phone charger or a hub may run the laptop, or slow the drain, without ever adding charge while the machine is in use. If the laptop charges when it is off or asleep but not while you work, that wattage gap is the likely explanation — the system is using everything the adapter supplies, leaving nothing for the battery.
  • Disconnect power-hungry accessories and test again; Microsoft lists this explicitly, because docks and drives can consume the charger’s headroom.
  • Look for damage. A frayed cable, a bent or dirty connector, or a charging port with debris in it can each stop charging. If you can see damage to the port, connector or cord, stop and contact the maker — Microsoft’s advice for visible damage is support, not further home fixes. Do not use a charger with a damaged cable.

Also note what the battery icon actually claims. Microsoft’s status guide separates cases that look alike: “plugged in, not charging,” a battery not detected at all, and the laptop not detecting the power supply despite it being connected are three different faults with different fixes — and a battery that is not detected, or a laptop that dies the instant you unplug it, points at hardware and a service visit rather than settings.

Only handle a removable battery if your model genuinely has one designed to come out, and follow the maker’s instructions for it. Most current laptops have sealed batteries; opening the case to reach them is not a troubleshooting step, and nothing in this article requires it.

Restart, then the battery driver

A plain restart — Start > Power > Restart, not closing the lid — clears temporary charging faults more often than it should. Microsoft’s Surface sequence adds a force restart for machines that will not respond normally (shut down fully, then hold the power button for 20 seconds), a Surface-specific step given here as an example of the maker’s own escalation, not a universal laptop instruction.

If charging still fails, the battery driver is next. Windows talks to the battery through a standard driver, and when it glitches, Windows can report “plugged in, not charging” for a battery that could charge perfectly well. Microsoft’s documented fix is to remove that driver and let Windows reinstall it:

  1. Plug the laptop in.
  2. Open Device Manager, expand the Batteries section.
  3. Open the battery entry (Microsoft’s pages name it Microsoft ACPI-Compliant Control Method Battery, or Surface Battery on a Surface), go to its Driver tab, and choose Uninstall Device.
  4. Restart the laptop. Windows reinstalls the driver as it starts.
  5. Install any pending Windows updates, and check the laptop maker’s support page for your model for BIOS and chipset updates, applying only what the maker publishes for your exact model.

Microsoft attaches one warning to this step: do not perform it on a Surface Pro X, where uninstalling the driver can only be undone by a full system reset. Read any warning on your own maker’s page before uninstalling anything.

Run a battery report and read your battery’s real health

If the charger, settings and driver all check out, measure the battery itself. Windows can generate a battery report: open Terminal or Command Prompt, run powercfg /batteryreport, and Windows saves an HTML report — open it in a browser (keeping the report on one side and your maker’s support page on the other is easy with how to split screen on Windows). The two numbers that matter are Design Capacity — what the battery held when new — and Full Charge Capacity — what it holds now. A full-charge figure far below the design figure means a worn battery, and a worn battery explains a laptop that charges slowly, stops early, or drops its charge oddly. It is the laptop counterpart of checking an iPhone’s battery health figure — see how to check battery health on iPhone for that side — and like that figure, it is a wear reading, not an error.

Wear is gradual and normal. Microsoft’s guidance on caring for a Surface battery frames the charge limits described above as the main defence: batteries kept at full charge, at high temperature, age fastest, which is exactly the pattern desk-bound laptops live in. A battery report showing heavy wear on an old machine is not a surprise and not a software fault — the choices are living with shorter runtime, using the machine mostly on mains power, or a battery replacement through the maker or a reputable repairer.

What not to do

Do not buy a replacement battery as a first response — on current machines the charge limit is a more common cause than a dead battery, and it costs nothing to check. Do not buy a cheap unbranded charger to test with: an underpowered or poor-quality adapter can reproduce the same symptom or worse, and Microsoft’s guidance is to use a supply that meets your model’s charging requirements. Do not drain the battery to zero repeatedly to “recalibrate” it — no maker page behind this article recommends deep-discharge cycles as a fix for a modern laptop battery, and a battery that will not charge gains nothing from being emptied. And do not ignore a battery that is swelling, a case that no longer closes flat, or a hot spot around the battery: stop using it on your lap, keep it on a hard surface, and contact the maker — that is a safety matter, not a troubleshooting step.

When it is a repair

Take it to the maker or a repairer when: the battery is not detected at all; the laptop switches off the moment it is unplugged, at any displayed percentage; the charging port or cable is visibly damaged; the battery report shows severe wear and the runtime no longer meets your needs; or charging fails with a known-good original charger after the driver reinstall. Those are hardware outcomes, and no setting in Windows changes them.

Frequently asked questions

Why does my laptop stop charging at 80 percent? Almost certainly a charge limit working as designed — Windows Smart charging or your maker’s battery health mode, which caps the charge to slow battery aging. Look for the heart symbol on the battery icon, and check your maker’s battery app or your model’s support page for the setting. It is a feature to leave on for a desk-bound laptop, and to pause only when you need a full charge.

My laptop is plugged in but the percentage is not increasing. Is the battery dead? Not necessarily, and not first. Check the cap (above), then the power path: original charger of the right wattage, secure connections, a different outlet. A charger that can run the laptop but not charge it under load is a common cause. A battery report’s design-versus-full-charge comparison is what actually tells you whether the battery has worn out.

Will leaving a charge limit on hurt my battery? No — the opposite. The limit exists because sitting at 100% ages a lithium-ion battery faster. Microsoft recommends keeping Smart charging on when you do not need a full battery soon. The trade-off is runtime on the days you unplug, which is why the setting can be paused for a trip.

What does “plugged in, not charging” mean in Windows 11? That Windows sees mains power but the battery is not accepting charge right now. That can be the charge limit (with the heart icon and “Fully Smart charged” message), a temporary driver glitch, an underpowered charger, or a genuinely worn or faulty battery. The sections above are ordered to separate those four.

Should I replace my laptop battery or my charger? Neither, until the checks say which. If the laptop charges from a known-good original-spec charger, the charger was at fault. If it charges nowhere and the battery report shows severe wear, the battery is. Replacing parts in the other order is how people end up owning a spare of the wrong one.

This article is general information, based on the battery and charging guidance published by Microsoft and checked in November 2026. Charge-limit settings, battery apps and menu names differ by manufacturer and model — where yours differ, follow your maker’s support page for your exact laptop, and stop and seek service for any visible damage or swelling.