Abstract: A valve-regulated, maintenance-free lead acid battery has plate compartments which are substantially surrounded by chambers that contain electrolyte absorptive material. Electrolyte droplets escaping through the pressure relief valves of the battery are directed to flow over the absorptive material in the chambers and are absorbed by it, while evolved gas escapes through a vent without appreciable pressure drop. The chambers also protect the plate compartments from impact and absorb electrolyte which might otherwise leak from the plate compartments.