Specification： Brand: For SAFT Model: LS17500 Voltage: 3.6 V Capacity: 3600 mAh Size: 50X14X14mm Weight:20g Shelf life: more than 10 years Nature: Primary lithium thionyl chloride (Li-SOCl2) battery Operating temperature range: -60 to +85 Feature: High energy, high reliability 3.6 volt power source; Excellent memory backup power source; Low self discharge rate gives this cell a 10 year shelf life; Stable voltage and broad temperature range (-60 to +85C). Application : Used in emergency backup, data collection, AMR Add-ons, smoke alarms, carbon monoxide detectors, Intrusion sensors. Package list: 4-Pack LS17500 battery