Battery, Wein Cell Px675 Replacement Box of 12 individually packed batteries.WeinCELL is a revolutionary new custom zinc/air battery designed to replace environmentally-unfriendly (and increasingly banned) mercury batteries. Alkaline replacements don't do the trick. Only WeinCELLs deliver exact voltage and stable output consistent with mercury batteries. Not to be confused with the hearing aid batteries that only last 1 month, the WeinCELL batteries last 1 year in the camera under normal use. * Compatible with any camera or meter specifying the respective mercury battery* Voltage output more stable than alkaline replacements.*No camera/meter adjustment or adapter required.*Up to 10 year shelf life.