Abstract: A container includes a body having a top and a bottom, with a plurality of receptacles defined within the body and configured to receive an electrochemical cell or battery therein, with each receptacle having an open first end located at the top of the body. The body further includes internal walls separating the receptacles laterally from each other. A cover is removably positioned to cover the top of the body, such that the cover and the body together define a plurality of sides extending between a top wall of the cover and the bottom of the body. A head space is defined beneath an underside of the cover and above the first ends of the receptacles. A vent extends through a first side, and the vent is in communication with the head space to permit gases within the head space to exit.