SS System ER14250 3.6V Lithium 1/2 AA Battery : Amazon.in: Electronics
Wireless PIR Sensor Battery 1/2AA 3.6V Lithium LS14250 Saft UK Alarm Security Wholesalers
Amazon.co.jp: EEMB ER14250 1/2AA 3.6V Lithium Battery Li-SOCL2 Non-Rechargeable Battery for XL-050F SB-AA02 LS14250 TL-5902 TL-2150 Dog Watch with Dog Collar and Some Exercise Monitors, Home Security Systems, Alarm Systems (1 Set) :
Tadiran 1/2AA Lithium Battery 3.6V with PCB Pins | Wiltronics