Starting Electronics Needs Your Help!
It is that time of the year when we need to pay for web hosting and buy new components and equipment for new tutorials. You can help by making a donation. Contribute to this website by clicking the Donate button. The total will be updated once daily. (You may need to clear your browser cache to see the updates.)
Target Amount: $2000
Amount Raised: $269
Created on: 30 July 2012
A coin battery or button cell is a small coin/button shaped battery. The photos below show an example of a CR2032 3V coin battery and battery holder.
These batteries are very often used to keep a real time clock (RTC) running when the main power to a circuit is switched off.