The environmental friendly GP 27A battery pack is especially formulated to meet the increasing demands of today’s new generation of high power devices such as; PDAs, Digital Cameras, Remote Controlled Toys, Audio and other portable devices. This battery is best for car alarms and burglar alarm remote controls, cigarette lighters and wireless door chime. Voltage: 12V. Single Use. Alkaline Battery with No Mercury. Powerful  performance used in Security Systems and Garage Doors