Something similar -- I use rechargeable AA & AAA batteries for daily users, but for batteries in kits I store lithium primary batteries with the flashlight but not in the flashlight. I have seen lithium batteries fail and don't want that happening in a light that does not see regular use and will be needed when it is seen.

As for the light in question: there are enough good to great flashlights available at that price point that are known and have a rep. Unless you are buying to evaluate, why experiment. Get a light with a good rep so you can trust it.

There is no free lunch; more lumen output generally means a shorter battery life. I have not seen a need to go past 200 lumen, YMMV.