Aricell SCL-14 C 3.6V Lithium Thionyl Chloride Battery - Replaces Xeno C XL-145F | eBay
Amazon.com: 2X EEMB ER14250 1/2 AA 3.6 V Lithium Battery with FT Tabs 1200 mAh Li-SOCL₂ 3.6Volt Lithium Thionyl Chloride Batteries Nonrechargeable UL Certified : Health & Household