From Tridonic this side-by-side Lithium Iron Phosphate (LiFePO4) Accus battery has been produced by a certified quality manufacturer and comes with an impressive 3 year warranty (from the point of delivery). It has been designed with a long shelf life and an 8 year design life. This product uses environmentally friendly technology and has been designed specifically for use in emergency light units. It can therefore withstand high-temperatures and continue to function reliably. This product is sold with polycarbonate fixing caps and safety features incorporated.