I have an MVP2 -the one with 2600 mA/h capacity- which, in spite of all the use it has seen, it still produce the intended runtime. And I use it, even if somebody may think it belongs to a vape museum, being only 11 W max.
Innokin is peculiar because they use rendundant safety protections on the battery. Equivalent to say Innokin mods use protected batteries in addition to the standard over/under voltage/current protections, and have a fuse, in line with the protections used in laptop computers. To the best of my knowledge, they are the only vape mod maker with this approach to safety.
So, IMO, you can use your CoolFire until it will stop working, without any risk.