flashlight @lemmy.world Fuck spez @sh.itjust.works 1w ago

My D18 after over 6 months of continuous illumination on a single charge in low power mode

16 comments

Somebody once did a test with a 1x18650 Zebralight on its lowest mode and got over 400 days (412, IIRC).
Mirrors in case media fails to load like it did for me:
Is this on a single charge? Any measurable change in output?
- Yes, I should have mentioned that. Nothing measurable yet but these are also decent quality matched 30Q cells that shipped with the light and this is only the second six month period into the experiment.
What does this mean? A single 18650 with 10 Wh can power 0.002 W continuously over 6 months. More than enough power to see light. But what would the point be? It is useless at that brightness.
- It is useless at that brightness.
  
  Absolutely not. I’m a sucker for ultra low brightness modes, as in fractions of a lumen. It’s great for dark adapted eyes. It’s more than enough to see and move around, doesn’t ruin your dark vision, and won’t wake someone up accidentally. Runtime is practically unlimited. Why waste battery if you don’t have to?
- It easily lights up the corner of my room on the beside table where I keep it in case I lose power. You can read by it with good eyes in a dark enough room.
  
  What happens if you lose power after it's dead from being on for 6 months?
- This light uses three 18650's.
- Dim light on for long time but not plugged in
  
  Literally that’s the appeal LOL, the enthusiast flashlight world is wild (speaking as one of them)
  
  Huh, interesting.
Cool, but why?
- For science, I guess?
  
  I mean I would have loved a real answer from op but I guess that ain't gonna happen.

16 comments