Stay up and running with the Energizer alkaline industrial battery system, designed to provide an economical power source for modern devices that require high power input and/or frequent use. Designed to provide long-lasting power and to meet heavy current and continuous use demands. These batteries operate well in extreme conditions and readily perform even after five years of storage. Batteries do not contain mercury. Battery Type: Alkaline; Battery Size: 9V; Voltage: 9 V; Material(s): Alkaline Manganese Dioxide.