Lengthy, but works in some lights - Nitecore NL1836R 3600mAh USB-C Rechargeable 18650 Battery

Just received, so cannot yet comment on battery life. However, can confirm this unit has USB-C and not micro-USB for charging. Can also confirm this fits and works in my Streamlight 88126 ProTac Rail Mount HLX-Pro, though it does feel like a tight fit, so not sure if that impacts longevity or effectiveness of the light in any way, though I doubt it. Overall length measures 71mm with my micrometer, compared to the two Streamlight CR123A batteries that came with the light, combined measuring a hair under 70mm. The Nitecore NL1836R protudes ever so slightly outside the end of the ProTac HLX-Pro before you put the cap on. By contrast, the two Streamlight CR123A's sit just inside the end. I unfortunately do not yet have any other lights to test this battery with, but hopefully this is helpful.