Laptop Plugged In But Not Charging? How to Fix It

Laptop plugged in but not charging? Before you buy a new charger, check one thing: many laptops deliberately stop charging at 80% to protect the battery. If yours says “Plugged in, not charging” or stops at 80%, that may be a feature, not a fault. Here’s how to tell, and how to fix real charging problems.

Stuck at 80% (or 60%)? It’s probably a charge limit

Most manufacturers include a setting that holds the battery at 80% (sometimes 60%) when you’re plugged in most of the time, because it makes the battery last years longer. Where to find it:

• Lenovo: Lenovo Vantage → Device → Power → Conservation Mode or charge thresholds.
• ASUS: MyASUS → Customization → Battery Care / Battery Health Charging.
• Dell: Dell Power Manager / Dell Optimizer, or BIOS → Battery Configuration (Primarily AC Use or Custom).
• HP: BIOS (F10 at startup) → Battery Health Manager.
• Microsoft Surface: Surface app → Battery & charging → Smart Charging.
• Mac: System Settings → Battery → (i) next to Charging → Charge Limit, or Optimized Battery Charging. Choose “Charge to Full Now” from the battery menu when you need 100%.

Need a full charge for a trip? Turn the limit off temporarily. Our guide to keeping a laptop plugged in explains why the limit is worth keeping on.

If it really isn’t charging

1. Check the outlet, charger and cable

• Try a wall outlet you know works, without a power strip.
• Look for a light on the charger brick or the laptop’s charging port.
• Inspect the cable for fraying near the plug and brick. Bent or damaged cables are a top cause.
• Make sure the plug is fully seated. Barrel connectors can wear loose over time.

2. USB-C laptops: port, wattage and cable matter

• Not every USB-C port charges. Look for a lightning-bolt or battery icon, or check the manual.
• The charger must provide enough watts. A 20–30W phone charger can’t charge most laptops, and Windows may show a “slow charger” warning.
• The cable must be rated for laptop power (60W, 100W or 240W). Many cheap USB-C cables aren’t.
• Docks and monitors with USB-C charging may deliver less power than the laptop needs under load.

Need a replacement? See our recommended USB-C chargers and cables.

3. Reset the battery and power management

1. Shut down, unplug the charger, and hold power for 30 seconds.
2. Plug the charger back in and start the laptop.
3. In Windows, right-click Start → Device Manager → Batteries, right-click Microsoft ACPI-Compliant Control Method Battery → Uninstall device, then restart. Windows reinstalls it automatically.
4. Update the BIOS and chipset drivers from your laptop maker. Charging bugs are often fixed in firmware. See how to update drivers and BIOS safely.

4. Check battery health

A worn-out battery may stop charging or charge only a few percent. Generate a battery report. If full charge capacity is far below design capacity, it’s time for a replacement.

5. Heat

Laptops pause charging when the battery is too hot or too cold. Let it cool down on a hard surface, and charge in a normal room temperature.

Signs it’s hardware

• The charger light goes off when you plug it into the laptop: a short in the port or laptop.
• Charging only works if you hold the plug at an angle: a worn charging port. A repair shop can usually replace it.
• Dell laptops showing “AC adapter type cannot be determined”: often a faulty charger or its center pin.
• A swollen battery (lifting trackpad, bulging case): stop using it and replace the battery.

FAQ

Is it bad that my laptop says “Plugged in, not charging”?

Not if a charge limit is on. The laptop runs from the charger and preserves the battery. If no limit is set and the battery is low, work through the steps above.

Can I use a phone charger for my laptop?

Only a high-wattage USB-C PD charger (usually 45–100W). Phone chargers are too weak for most laptops.