Laptop Only Works When Plugged In, Dead Battery Fix

If your laptop works perfectly on the charger and shuts off instantly the moment you unplug it, the charger and the laptop are almost certainly fine. The battery is the problem: it is either dead, disconnected, or not being detected.

What this symptom means

A laptop that dies instantly when unplugged is running entirely on the adapter. The battery is contributing nothing: either it holds no charge at all, it is not connected, or Windows cannot detect it. The diagnostic path is the same as for a battery that is not detected, with the battery health report as the decider.

The fixes, in order

  1. Check what Windows reports. Click the battery icon. If it says “No battery is detected”, follow the not-detected steps below. If it shows a percentage that never changes, the battery is probably worn out.
  2. Do a full power reset. Shut the laptop down, unplug the charger, and if the battery is removable, take it out. Hold the power button for 30 seconds, put the battery back in firmly until it clicks, plug in the charger, and start up.
  3. Check the battery health report. Open Command Prompt as administrator and run powercfg /batteryreport, then open the report and compare Design Capacity with Full Charge Capacity. A battery holding a small fraction of its design capacity, or one that shuts the laptop down with charge still showing, has reached the end of its life.
  4. Check the BIOS. Restart and open the BIOS or UEFI setup (usually F2, Del, Esc, or F10). Look in System Information, Power, or Battery Information. If the BIOS shows no battery, Windows fixes will not help: the battery, its connector, or the firmware is at fault.
  5. Reinstall the battery driver. Right-click Start, open Device Manager, expand Batteries, right-click Microsoft ACPI-Compliant Control Method Battery and choose Uninstall device. Restart and Windows reinstalls it.
  6. Update the BIOS. Get the latest BIOS for your exact model from the maker’s support site and install it with the charger plugged in. Do not interrupt the update.
Do not keep using a swollen battery. If the bottom case is bulging, the trackpad is lifting, or the battery feels puffed up, stop charging it. Do not puncture or press on it, and contact the maker or a repair shop. A laptop with a swollen battery should not be used, even plugged in.

The usual answer: replace the battery

In most cases this problem ends with a battery replacement. A battery that dies instantly on unplug has usually lost almost all of its capacity, and no driver or setting brings that back. Buy a genuine replacement from the laptop maker when you can: cheap third-party batteries are a common source of repeat problems, and a battery that is three or more years old is a prime suspect. If the laptop is still under warranty, contact the maker first. On a sealed laptop, replacement means opening the case, so have a repair shop do it unless you are comfortable with that.

Common questions

My laptop works on the charger but dies instantly when unplugged. Is the charger broken? Almost certainly not. If the laptop runs fine on the charger, the charger is delivering power. The battery is the part that is not holding any charge. Check the battery health report to confirm.

Can a dead battery damage my laptop if I keep using it plugged in? A dead battery is usually harmless to keep using plugged in, but a swollen battery is not: stop using the laptop and get it replaced. A dead battery also means any power cut shuts the laptop off instantly, so save your work often.

How long should a laptop battery last? Most laptop batteries are rated for around 300 to 500 full charge cycles, which works out to roughly two to four years of normal use. After that, capacity drops noticeably, and a battery holding 60% or less of its design capacity is due for replacement.

Related guides

Laptop Battery Not Detected · Laptop Plugged In, Not Charging · Battery Replace Warning · Battery Health Low

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