This Tridonicbattery is designedto be used in emergency lighting units and to withstand high temperatures. As a result it retains good charging properties and stable operation even at higher temperatures. The battery has a capacity of 4.0Ah and each cell has a voltage of 1.2V. This product comes with a one-year warranty polycarbonate fixing caps and a connecting cable. Designed for use for up to 4 years.