This is the same cell Shockli 26650 IMR 5500mAh
And here is its review Test/review of Shockli IMR26650 5500mAh (Black) 2017
It runs a little fat but fits most lights. In my humble opinion it’s the best of the 26650 cells out there with the highest capacity and a 30 amps discharge. As far as cell age, I’m still using 10 year old batteries. You’ll probably never tell the difference, it’s still a fairly new cell. It’s couldn’t be more than 2 years old at the worst.