30pcs Tadiran TL-4955/TL-5955 2/3AA 3.6V 1650mAh Li-SOCI2 Battery Power
Capacity: 1650mAh. Chemistry: Lithium Thionyl Chloride (Li-SOCI2). The storage area should be clean, cool (not exceeding +30 Deg C ), dry and ventilated Don't use different models of battery in series.