A Chevette will pull a small trailer for a long way, but you will wear out the car much quicker. A Chevette will pull a large boat a short way until it self destructs. Like a car, a battery is about power and build with the trailer representing a load like your coil.
So how long that battery will work is dependent on the load you are applying. Folks who know cars, old cars, will tell you a Chevette will not pull a trailer when what they really mean is that you will destroy the car doing so.
Yes, your Vamo v5 is not suppose to work with a Trustfire protected battery because it is bad for the battery and is a safety hazard. That does not prevent it firing the
device and doing the battery damage. Enough damage and the battery will fail. Since it is not a safe chemistry battery and a brand name that is well known to be on the poor side of quality, when it fails it will be enough of a hazard that I wouldn't let you vape it on my property.
That is why you have read that it is not supposed to work with protected
batteries. The real question is why would you use that battery if you already knew it was not supposed to be used?