The bell smart home battery pack is the perfect addition to your security & control panel that provides you with long lasting secure power. This battery pack can be used as a replacement for your existing battery. Features voltage: 12 volts capacity: 7000mah rechargeable sealed lead acid alarm battery replacement battery for: vista-15p, vista-20p, vista-21ip, vista-32fb, vista-128, dsc 1555, dsc 5010, dsc 1616, dsc 1832, dsc 1864, dsc neo, c&k sierra includes instructions for the installation of your bell smart home devices