Current value for obtaining 1.0V cell voltage when pulse is applied for 15 seconds at 50% discharge depth at 23 degrees C.
According the specifications posted at Battery Junction, the Titanium Innovations CR123A battery has a maximum continuous discharge current of 1.5 amps. This is the same limit that CR123A batteries made by other manufacturers have. The same spec at Battery Junction says that 3.0 amps is the maximum pulse discharge current for the Titanium Innovations CR123A battery.
Now, I do not have any details about how the pulse discharge current is determined for the Titanium Innovations CR123A battery. I do, however, have a spec sheet for the Sanyo CR123A battery. It defines maximum pulse discharge current to be that current that causes battery voltage to sag to 1.0 volts in only 15 seconds!
Here is the quote:
Obviously a "useful" pulse will usually be significantly shorter than 15 seconds.
So why does the spec at Battery Junction say that the PTC High Current Discharge Protection on the Titanium Innovations CR123A battery is set to 5 amps? That is much higher the PTC used by CR123A batteries that are made in the U.S.A. Frankly, it is higher that what I choose to use myself. Having the PTC set to 5 amps allows many flashlights to pull too much current from CR123A batteries.
In the last decade, high-output LED flashlights have surpassed the current that CR123A batteries can safely supply. All the CR123A batteries that I have checked are rated for a 1.5-amp maximum continuous draw. In a 2xCR123A series configuration, that means a top output of around 600-700 lumens.
CR123A still has an important place in the flashlight world. Its small size, long storage life, and good operating characteristics at temperature extremes (both hot and cold) mean that it will continue to be used for the foreseeable future.
Just don't try to pull too many amps.