You might not even have known about this little battery, but you'll notice the effects when it stops working.
By Calvin Wankhede Oct. 26, 2026 8:15 am EST Maryia_K/Shutterstock Add Engadget on Google: Google DiscoverLook closely at a desktop computer's motherboard, and you'll notice a small disc-shaped battery that was installed from the factory. This coin-sized battery powers your computer's real-time clock and helps preserve basic hardware-related settings when the machine is turned off.
