Panasonic LRV08 Battery This popular small battery is commonly used in car alarms & burglar alarm remote controls & cigarette lighters. Type: Alkaline. Voltage: 12 V. Length: 28.9 mm. Diameter: 10.3 mm. Also known as: L1028 / RVO8 / 23A / MS21 / MN21 / E23A / K23A / V23GA / GP23A / 8LR932 / 8LR23 / VR22 / 8F10R.