4x EVE ER14505 AA 3.6V Lithium Li-SOCl2 Battery LS14500 Bulk Cells
Battery size: AA. Manufacture date: 2019. Type: Lithium-thionyl chloride (Li-SOCl2). High Current Pulse and Continuous Discharging Ability. Weight (of one battery): 18 g (0.039 lbs). Made in China.