From Tridonic this LiFePO4 Accus battery uses Lithium Iron Phosphate cells. This product is designed for use in emergency lighting units and features a design life of up to 8 years with a 3 year guarantee. This high energy battery uses environmentally friendly technology and has a low profile cross section with removable end caps. This product operates reliably even in high temperatures. It also has a long shelf life and safety features incorporated. This product is sold with suitable polycarbonate fixing caps.