The EN93 is an Energizer C-size alkaline battery designed for general-purpose portable power applications. It features a nominal voltage of 1.5 volts with a zinc-manganese dioxide (Zn/MnO2) chemical system and a nominal internal resistance of 150 to 300 milliohms when fresh. The battery operates reliably across a temperature range of -18°C to 55°C and has a typical weight of 66.2 grams with a volume of 26.9 cubic centimeters. With a shelf life of 10 years at 21°C and no added mercury or cadmium, the EN93 is well-suited for lighting, toys, portable stereos, and other consumer electronics requiring dependable, long-lasting power.