Review: Fenix HM50R, a compact angle headlamp that adjusts its brightness whether you like it or not

The Fenix HM50R is a small right-angle flashlight/headlamp using an included 16340 rechargeable battery and USB charging, or disposable CR123A battery. The HM50R features an intentional slow rampdown of its brightness during use designed to prolong runtime despite having hardware capable of sustaining full brightness. There is no way to turn this feature off. It seems like the HM50R is designed for inattentive users, or to compete with low-quality headlamps that advertise absurdly unrealistic runtimes.