The CR2032 3v 220mAh Lithium Battery with 2pin Connector is a button cell battery that is commonly used in watches, calculators, and other small electronics. The battery can provide power for up to 10 years and is an environmentally friendly battery that does not need to be disposed of in a hazardous waste landfill. This battery can be used in place of a coin cell battery and is easy to install. This CR2032 3v 220mAh Cmos Lithium Battery is a replacement battery for electronics such as cameras, watches, toys, and calculators. This battery is made of Lithium-ion technology and is designed to be long-lasting. A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer is not plugged into a wall socket, the battery has an estimated life of three years.