The Sealed Lead Acid Battery 12V 2.1Ah from EnerSys is a rechargeable sealed lead acid battery. It has a voltage of 12 volts and a capacity of 2.1 amp hours. The battery has stainless steel terminals and measures 3.94 x 2.56 x 3.70 inches. It can be mounted in any orientation and is commonly used for emergency lighting, security systems, communications equipment, and UPS systems. The battery is maintenance free and spill proof. It has an estimated service life of 5 years and includes a 1 year full replacement warranty from EnerSys.