Fortuner Tubular Batteries are manufactured with Heat Sealed Polypropylene Co-Polymer Mono-block casing material. Tubular positive plates are made of highly corrosion-resistant special lead alloy and Pasted Negative Plates with high discharge performance to ensure cycling capabilities and also reduce topping-up frequency. Individual cells are fitted with Micro Porous aqua-trap ceramic vent plugs with sealed float, which prevents acid mist from coming out from the cells to make it convenient for living room ambiance.