CR123A is the most popular primary lithium battery, with the advantages of high energy density, long shelf life, stable voltage output, wide operating temperature range, safety and light weight, and so shares 50% market of cylindrical Li/MnO2 batteries.

It is used widely in film camera, flashlight, decurity system(smoke alarm/detector, motion sensor, surveillance camera, smart lock), tracking devices, medical devices(AED, surgical stapler), smart meters, military and professional equipments.