This NiCd battery pack by Tridonic is 4.5Ah and has a 3 Nickel Cadmium cells. It is designed for use with emergency lighting units and has a 4 year design life. It is sold with a 1 year guarantee from the point of delivery. As this product is designed for emergencies it can maintain operation in high-temperatures. It also has good charging properties at high temperatures. The casing material of this pack is polycarbonate and it is sold with 1 metre of integrated double insulated tape and 1.0mm2 solid pre-stripped wire.