Aricell 3.6V 1/2AA Lithium Battery - LITHXL-050F at Batteries Plus
Amazon.com: 1/2 AA Size 3.6v Lithium Battery, ER14250 LS14250 1200 mAh Batteries Compatible for Dogwatch Dog Collar and Some of Movement Monitor/Home Security System/Alarm System - by TYRONE (16 Pack) : Health
1/2AA Lithium Battery for USB Data Loggers - Gilson Co.
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
Amazon.com: OmniCel ER14250 3.6V 1/2AA Lithium Standard Battery Button Top, 4 pack : Health & Household
AA-1/2-LI , half of AA size battery, 3.6V Lithium battery, Non-rechargeable.