Amazon.com: EBL 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) : Health & Household
Tadiran TL-4902/S, 3.6 Volt 1200mAh 1/2 AA Lithium Battery