Keep your devices running for longer by using the Lenmar WCCR1220 CR1220 Lithium Coin Battery. It makes an excellent replacement for batteries that have been drained, worn out, damaged or misplaced. The lithium coin cell battery is designed to be compatible with several different items. Use it to power your calculator, watch, camera and many other small devices around your home. This lithium 3V coin battery is formulated to have a long operating life. This allows your unit to run for an extended period of time before you have to find a replacement. It has a compact design that's ideal for many small and flat items. It will easily slide into place when it's being installed and can be quickly removed when being replaced. Even though it has a compact frame it can provide a large amount of reliable power. The Lenmar WCCR1220 CR1220 Lithium Coin Battery is the way to go when it is time to power devices that people think will run forever.