Amazon.com: 4X EEMB ER14250 Nonrechargeable 3.6V Lithium Battery Li-SOCL₂ 1/2 AA Size 1200mAh High Capacity UL Certified Single-Use 3.6V Lithium Thionyl Chloride Battery DO NOT Charge Battery : Health & Household
1/2 AA Size 14250 ER14250 3.6V Lithium Batteries, 1200mAh High Capacity Batteries for Dog Collars and Baby Movement Monitor Alarm Systems and More (Non-Rechargeable) – Totalhill.com – Toys and Game Store
Amazon.com: 1/2 AA Size LS 14250 ER14250 3.6 Volt 1200 mAh Lithium Batteries 4 Pack, Tyrone Batteries Compatible for Dogwatch Dog Collar and Some of Movement Monitor/Home Security System/Alarm System : Health & Household
List of battery sizes - Wikipedia
Tektite: 1/2 AA Battery set, Replacement batteries, 1/2AA
Xeno Energy XL-050F 1/2 AA 3.6V Lithium Battery - Walmart.com