1/2 AA size Lithium Thionyl Chloride Cell With PC Pins. This battery has 1 pin on the negative (-) side and 2 pins with 10mm spacing on the positive (+) side for soldering to a board.
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 +85°C).