First I would ask, given the batteries you are currently using, that you feel the need to have a flashlight that is equivalent to 4 car headlights almost? I rarely use the 1100 lumens setting on a somewhat floody light I have. Just an FYI, flood is almost always more useful.
Stick to name brand cells, or what Nitecore sells you and you will never have anything to worry about. I keep my lithium cells / flashlight in the fridge (for long storage, I put them in the freezer). Unless you are discharging it every day, if you store that flashlight/battery in the fridge, the battery will likely last over a decade. I have some 10+ year old fairly cheap cells I keep in the freezer that still have 90% capacity.
Oh, and I blocked Chillin a while ago. Some people know a lot less than they think they do. I don't have time for that.