I wonder if we have to face more and more flashlights with built-in battery packs in the future. Olight's X7R/X9R, Acebeam's X65/X70, Imalent's new lineup with the R90C/MS12, Nitecore's TM10K...these are just some examples from recent market launches and they all work with proprietary battery packs. Certainly, there might be substantial reasons why a prioprietary battery pack is better than individual cells used by the customer but in the end it will lead to higher cost/prices, more dependency on the manufacturers warranty policies and spare part availability and less flexibility if you take the entire lifecycle of the flashlight into account. I also wonder if any of these manufacturers have a plan how to recycle those battery packs. Call me pessimistic but I expect nothing but to find those battery packs on a remote waste dump in Nigeria some years later.