Amazon.com: Saft LS14250 3.6V 1/2AA Lithium Battery, 3.6 Volt 1200mAh, GE Simon XT : Health & Household
Amazon.com: EEMB ER34615 Non-Rechargeable 3.6V Lithium Battery Li-SoCl2 D Size 19000 mAh High Capacity UL Certified Single-Use 3.6V Lithium Thionyl Chloride Battery DO NOT Charge Battery : Health & Household