CR123A batteries are probably best known in Australia as ‘camera batteries’ , which was the first and most likely still the best known use of CR123A batteries. Since that time CR123A batteries have branched out due to their strong lithium ion output. These days they are used in torches, communications equipment, lasers, range finders and anything which requires high energy outputs from a compact package.
In Australia CR123A batteries are readily available from the major and medium size brands such as Energizer, Duracell, Kolt, etc. There are even bulk CR123A batteries available for larger users.
The most common names for CR123A are 16340, CR123, 123, 17345, CR-123A, 5018LC and CR17345.
A good comparison of CR123A batteries is available at CR123 .com.au