- Joined
- Apr 27, 2016
- Messages
- 351
Sorry if this isn't the right place to ask but after some searching I didn't find the info I'm looking for.
I have a light with the H17F (or H17Fx, I don't actually know) driver and its behavior with a primary battery isn't what I expected. Low mode is ~1 lumen, medium is ~20 at the most. According to what I've read about the driver, it sounds like a primary should at least power the light on low and medium. That would be sufficient in an emergency if I didn't have an 18350 handy.
Here's what I don't understand: When testing a primary, the light doesn't come on at the low setting. From off, click and nothing happens. But click again and it lights up at the medium setting. It will try to sustain the next setting up but runs out of steam right away. That's fine, I'm only interested in knowing that it will function on low and medium, as that's enough in an emergency. The failure to illuminate at 1 lumen doesn't make sense to me. Could someone please help me understand why a primary isn't able to power this driver at what seems to be a very doable level? Tested several primaries, by the way, all new out of the package and from a couple of different (reputable) manufacturers. Same behavior with all of them.
I have a light with the H17F (or H17Fx, I don't actually know) driver and its behavior with a primary battery isn't what I expected. Low mode is ~1 lumen, medium is ~20 at the most. According to what I've read about the driver, it sounds like a primary should at least power the light on low and medium. That would be sufficient in an emergency if I didn't have an 18350 handy.
Here's what I don't understand: When testing a primary, the light doesn't come on at the low setting. From off, click and nothing happens. But click again and it lights up at the medium setting. It will try to sustain the next setting up but runs out of steam right away. That's fine, I'm only interested in knowing that it will function on low and medium, as that's enough in an emergency. The failure to illuminate at 1 lumen doesn't make sense to me. Could someone please help me understand why a primary isn't able to power this driver at what seems to be a very doable level? Tested several primaries, by the way, all new out of the package and from a couple of different (reputable) manufacturers. Same behavior with all of them.