RS PRO Lithium Thionyl Chloride 3.6 V, 1/2 AA Battery This 1/2 AA size lithium-thionyl chloride battery from RS PRO provides a small and compact source of power. It has a cell voltage of 3.6 V and is frequently used in electronic devices such as pulse oximeters. The battery's lithium thionyl chloride composition offers steady and reliable energy throughout its lifetime. It also has a long shelf life thanks to its self-sealing structure and can be stored in excess of 15 years. The unit's broad operating temperature range (-55°C to +85°C) means it will stand up to harsh environmental conditions, such as extreme cold. This speciality battery is RoHS (Restriction of Hazardous substances) compliant, so only contains minimal levels of harmful substances. It also conforms to European Union standards for restricting harmful substances in electronic equipment. Features and Benefits - Lithium-thionyl chloride chemistry - Capacity of 1.2 Ah - Maximum constant current discharge of 40 mA - Low self-discharge rate of 1% per year at +20°C - Dimensions of 14.5 mm x 25.5 mm - Lead terminal type