CR1/3N batteries, which are sometimes listed as CR11108 batteries, are sort of like coin batteries, but they are very thick. Another way to think of them is that they are like a much shorter AA battery. Regardless, these batteries are not used often. Their most common application is inside of photography equipment.
The only sensor we know of that uses a CR1/3N battery is the Honeywell 5802 Panic Switch. Only the standard version of this device uses the CR1/3N battery, and the battery inside the device is not easily replaceable. This is an older device, and it is often recognized as the Ademco 5802.
Regardless, users are not likely to encounter this key fob, as there are much more versatile and useful key fobs available. A prime example is that of the Honeywell 5834-4. So unless your a photographer with some special camera that uses a CR1/3N battery, you will probably never need to use this type of battery.
But on the off chance that you do have a security product that uses this obscure battery, well, we have you covered. The fact that we even carry these batteries goes to demonstrate our amazing versatility. With a fresh battery, your security device will remain powered for an extended period of time. And with battery powered devices, you don't have to worry about power outages.
And you never know when a company might release a new product that uses CR1/3N batteries. However, if we had to guess, we would say that this is particularly unlikely. After all, why use this type of battery when you could use a common coin battery, like a CR2032 or a CR2025. Or you could just use a more standard cylindrical battery, like AA batteries or a CR123A. Still, the CR1/3N will likely be around for awhile, just lurking in the shadows.