Abstract: An electrochemical cell with a separator having a reinforced edge that provides structural rigidity to the separator after it has been contacted by the cell's electrolyte. The reinforced edge extends beyond the interface between the cell's electrodes and serves to contain fragmented pieces from one of the cell's electrodes that may become dislodged when the cell is dropped.

Abstract: A light device having a battery and lamp housing and a hinged top door. Batteries and a lamp holder are located within the housing and are accessible by opening the hinged top door. As the hinged top door is opened, a cam surface that holds the batteries in tight contact with the lamp holder moves away from the batteries, thereby releasing the tension holding the batteries in place within the housing. The batteries can therefore be easily loaded and unloaded. Likewise, as the hinged top door is closed, the tension holding the batteries in place is reapplied to the batteries to create a circuit for powering a lamp engaged with the lamp holder. Furthermore, the lamp engaged with the lamp holder is also accessed through the hinged top door.

Abstract: A ventable seal is provided for closing the open end of an electrochemical cell. The seal incorporates indentations formed in the outer surface of the centrally located hub that abuts a flexible diaphragm at a ventable interface. If a cell's internal pressure reaches an unsafe level and the seal ruptures, the indentations prevent resealing of the ruptured seal thereby avoiding a second build up of pressure within the cell.

Abstract: A pressurized container with a vent assembly that reliably prevents resealing of a vented seal member is provided. In one embodiment, the vent assembly seals the end of a container that includes a first electrode, a second electrode, a separator located between the first and second electrodes and an electrolyte in contact with the electrodes and separator. The seal member includes at least two protrusions on the surface of the seal member. The protrusions define and maintain a gap between the cover and seal member after the seal member has ruptured thereby allowing pressure within the container to be reduced.