Energizer 377 Silver Oxide Batteries, For Watch, Toy, Glucose Monitor, Calculator, 377, 1.6 V DC, Silver Oxide/Zinc Alkaline, 144/Carton (EVE377BPZ2CT) Case of 144Silver Oxide Batteries are designed for continuous low drain and high pulse on demand so they are perfect for watches, toys, glucose monitors, calculators and more. At 1. 55 volts, the silver oxide zinc alkaline battery offers higher voltage than comparable mercury batteries and a flatter discharge curve than alkaline manganese dioxide batteries. Mercury free battery also has good resistance to shock, vibration and acceleration. Cell size is 377. It