Its usually written something like “output DC 19.5V (19.5V) 4.62A(4.62A). Your Alienware charger has a sticker like the one below which shows the voltage and amps that your laptop needs. We are not going to go it electronics here, will keep it basic. Windows will automatically reinstall the drivers and your laptop should now be charging if it was a drivers issue.
Finally, put the battery back and connect the charger, switch on your laptop. Now shutdown the Laptop, then unplug it and remove the battery. Select Uninstall, don’t worry windows will restore the drivers back automatically. Right Click on Microsoft ACPI-Compliant Control Method Battery. Now go to Batteries section, click to expand. Select The Device Manager on the left column, Alternatively search for select Device Manager from the Start menu. Go to This PC, Right Click on this PC and select Properties. Disabling and enabling it may fix the error and have your battery charging again. The Microsoft ACPI driver is the one responsible for power management as well as plug and play functions. I will start with the software side Uninstall Microsoft ACPI-Compliant Control Method Battery Device Manager batteries section to uninstall the ACPI driver The other causes of the error plugged in not charging are, voltage and amps charger issues, fake chargers, BIOS malfunction, Windows services and drivers. Here is a list of available batteries at reasonable prices. One faulty cell is enough to cause your battery to stop working. If it shows physical deformities I highly recommend getting a new one. Just because it works if you do workarounds on it doesn’t mean you shouldn’t throw it away. In actual fact it might end being more costly after frying your motherboard or causing short circuits. 
Its simply not worth it to save on a charger. If any part of the charge looks like the images below buy a new one here or on Amazon Deformed or frayed charger can cause the error Alienware plugged in not charging Eliminating the obvious Charger problemįirst I will eliminate the obvious if your Alienware charger is either deformed, frayed or chipped, you need to replace it.
The following applies to all alienware laptops, alienware m17x r2, Alienware 16r 3 which ever you have.
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