The AAAA primary battery weighs 43% less than AAAs, has 40% less volume, and measures 20% thinner. This alkaline battery from Energizer is designed for use in small electronics and devices. Its compact design offers 1.5V that can operate in a wide variety of temperatures. Ideally meant for use in laser pointers and Stylus pen lights, this AAAA alkaline battery has a zinc-manganese dioxide chemistry and no added mercury or cadmium.