I’m very impressed with the Osram 21B. Couple of questions:
1) If I run it on an 18650 am I sacrificing power output or just runtime? I think my cell maxes out at 5A so if the driver is 6A it could possibly be slightly brighter with a higher current cell?
Ok so I’m pretty sure the 20mm forward clicky will fit because the 17mm one fits and works perfectly with the rubber cut, it’s just a bit too narrow to be ideal for the light. Got the 20mm ones on order now.