Need a random battery size? Then you`ve come to the right place!This is a Panasonic LRV08 12v Micro Alkaline Battery yes that`s right `Micro Alkaline`. Who doesn`t love a Micro Alkaline battery? We sure love them here at Refresh Cartridges!What`s it for I hear you say? Well, according to the box, Head lamps (that`s on your head, not a car), motion sensors and heart rate monitors. I`m sure they have lots of other uses but if you need an LV08 battery then look no further!