S CR 1/2 AA SLF (6127-201-301) Batteries Lithium 3,0V Varta (3V - 0,95Ah) | Mister Battery
EEMB ER14250 LS14250 1/2AA 3.6V 1200mAh Lithium Battery half aa batteries Li-SOCL₂ Non-Rechargeable Battery for Dogwatch Dog Collar and Some of Movement Monitor/Home Security/Alarm System (10): Amazon.co.uk: Electronics & Photo
Tadiran SL-750 1/2 AA Lithium Thionyl Chloride Battery (1 Pack)