Many laptop users have experienced this situation: the battery percentage is stuck at a certain value when plugged in, but the display shows "Not Charging". This usually happens when the battery power is 40-60%, like the common 51%. Don't worry, this may be a sign that the battery needs calibration rather than a hardware failure.

Why does the message "Plugged in, not charging" appear?

Laptop battery management systems (BMS) can sometimes miscalculate the actual battery capacity. When the system misjudges the battery status, it stops charging to prevent "overcharging," even if the battery isn't full.

12-step battery calibration method

Preparation

• Make sure you have 30-60 minutes of free time
• Save all your work, as it will require multiple restarts during the process

Step 1:

Shut down Windows normally and turn off the laptop completely

Step 2:

Disconnect the laptop's AC power plug (charger)

Step 3:

Carefully remove the laptop's battery (Note: Some ultra-thin laptops may not be able to remove the battery, so please skip the battery removal step for such models)

Step 4:

Reconnect the AC power plug to the laptop

Step 5:

Turn on the laptop and start Windows normally

Step 6:

Uninstall all Microsoft ACPI-compliant control methods

• Open Device Manager (right-click "This PC" > Manage > Device Manager)
• Expand the "Batteries" category
• Right-click each "Microsoft ACPI-compliant control method battery" and select "Uninstall device."
• If there are multiple battery entries, uninstall them all.

Step 7:

Shut down Windows again and completely shut down the laptop

Step 8:

Disconnect the AC power plug

Step 9:

Reinsert the battery into the laptop (if removed previously)

Step 10:

Reconnect the AC power plug

Step 11:

Turn on the laptop and start Windows

• The system will automatically reinstall the battery driver

Step 12:

Perform a complete charge and discharge cycle 3 times

• Let the battery fully discharge until the computer automatically shuts down
• Continuously charge to 100% (do not interrupt)
• Repeat the above process 3 times

IMPORTANT TIPS

The most critical part is always to let the battery cool to room temperature between charge cycles. High temperatures are the biggest enemy of lithium batteries, and heat buildup can significantly shorten battery life.

Additional suggestions

• After calibration, try to keep the battery between 20%-80%
• Performing a full charge and discharge once a month helps keep the battery healthy
• If the problem persists, the battery may be aging, and you need to consider replacing it

This method works for most laptop brands, including Dell, HP, Lenovo, Asus, etc. If the problem is not solved after the 12-step calibration, it is recommended to contact the manufacturer's customer service or a professional repairman to check the battery health.

Remember, regular maintenance is more important than repairing after a failure. Developing good battery usage habits can significantly extend the life of your laptop battery.

If this article still doesn't help your laptop battery, you can buy a new battery at  BatteryMall.com

If you want to learn more about batteries, please visit: BatteryMall.com/blogs/suppor