Tadiran SL-750 1/2 AA Lithium Thionyl Chloride Battery (1 Pack)
EEMB ER14250 1/2AA 3.6V 1200mAh Lithium Battery Li-SOCL₂ Non-Rechargeable XL-050F SB-AA02 LS14250 TL-5902 TL-2150 for Dogwatch Dog Collar and Some of Movement Monitor/Home Security/Alarm System (4): Amazon.co.uk: Electronics & Photo
SB-AA02
Lithium cell 1/2AA format 3.6V weldable - DIVEAVENUE