If you believe your CMOS battery is bad, we recommend you contact customer service for assistance.Desktops Make sure you are properly grounded with an anti-static wrist strap or comparable device.Unplug your computer and remove the two screws securing the side panel to the chassis.Locate the CMOS battery and remove it.Install a new CMOS battery and make sure it is fully seated.Replace the case and reconnect power to the system. Notebook, Laptops and TabletsNotebook computers often require partial disassembly to access the CMOS battery. Make sure your computer is unplugged and you are properly grounded with an anti-static device. If the clock time in the BIOS resets every time your computer restarts or is powered off, then your CMOS battery is most likely bad.Replacing your CMOS batteryIn general, it is fairly easy to replace your CMOS battery if you can easily access it. You can check to see if the CMOS battery is working by accessing your BIOS/UEFI and checking the time in the BIOS/UEFI. How to tell if your CMOS battery is bad If your CMOS battery fails, your system will revert to the factory settings and you may notice that the time keeps resetting on your computer. The CMOS battery is generally a coin-cell CR-2032 battery that will generally last the lifetime of your product. What is a CMOS battery and how can it be replaced?Most Acer computers contain a CMOS (Complementary Metal Oxide Semiconductor) battery that provides power to the CMOS chip to allow the computer to save settings when it is turned off. These can be purchased from any hardware store or from Amazon.CMOS Battery Replacement - Acer Community You will also need a replacement CR 2032 battery. Just make sure before working on your computer that everything is unplugged so there isn’t any power going to your computer. Replacing the battery is a pretty simple task that anyone can do. If you computer is showing the wrong date and time might prevent you from accessing the internet or some webpages won’t load correctly if you time and date is off.
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