The Ever Ready PJ996 4R25 6V Lantern Battery is specifically designed for use in hand held electric lanterns and the few other devices which require a PJ996 Battery. Although the technology in the Ever Ready 6v is of an older type, specifically a dry cell zinc-carbon composition, advances in the efficiency of lighting technology have really helped make the most of these batteries. In addition to being inexpensive to manufacture and sell as opposed to alkaline batteries, the Ever Ready 6v does not contain mercury and as such, is less of an environmental hazard when being disposed of. The casing is plastic as well, as opposed to metal or cardboard, and ensures that moisture stays out while trudging through the bushes or working in the garage. This is a simple, .