In search of 1000 hours of moonlight with an AAA cell
- Thread starter sbslider
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Oh, totally fair. That would be a lot of work to do precisely, ie in a controlled temperature environment.
I think you’re going to get 1000 just as it is!
The Zebralight H53c N on level 2 (0.07 lumen) with a AAA lithium primary cell is at 895 hours, and the cell voltage is down to 1.51 V out of the light. Once the cell voltage gets much below 1.5V it really starts to drop off in voltage quickly as the load continues. Only 105 hours to go, thinking it could happen yet . . . .
1006 hours and still going, the cell is now at 1.45V.
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The only real way to beat this runtime at this output is a simple boost/resistor circuit, lol...holy cow, what's the voltage safe low shelf?
Not sure what you're asking, but the cell will work down to around 1.4V then drop off very fast. I haven't measured the current lately but it's somewhere between 1 and 2mA. I think the light is specified to work down to 0.7V.
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Nice! I just wasn't sure if lithium primaries are as finicky as their rechargeable counterparts when discharged very low...
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Sooo...2 month runtime attempt, then? :grin2:
Yeah, I'll let it continue until there's no light left yet. I'd be surprised if it lasts more than a few more days. 42 days and counting, doubt it will make it to 50 days.
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Good, I hope it doesn't.
jon_slider
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the spec is 84 days from an AA 2450mAh Eneloop
if the testing battery now is AAA 1250mAh Lithium Iron Primary.. by extrapolation, it would meet capacity spec right around day 42, which it has already achieved....
impressed I am.. thanks! ;-)
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jon_slider
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yes,
on AAA Alkaline:
Level 1 ran 768 hours
Level 2 ran 864 hours
and so far on AAA Lithium Primary:
Level 2 has run 1006 hours
Just a minor clarification, the HC53 n was used for a few tests the past few months.
AAA alkaline ran 773 hours on level 1,
AAA alkaline ran 873 hours on level 2.
I wanted to see it get 1000 hours on a primary cell, and that's been accomplished!!
As of this post it's still running after 1015 hours.
AAA alkaline ran 773 hours on level 1,
AAA alkaline ran 873 hours on level 2.
I wanted to see it get 1000 hours on a primary cell, and that's been accomplished!!
As of this post it's still running after 1015 hours.
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We had candles that lasted 8 days so...anything is possible?
The
The test has ended, 1035 hours on level 2 of a HC53 n powered by a 9 year old AAA Energizer Ultimate Lithium cell. Light is flashing periodically, maybe every 15 seconds, similar to when I tested with the alkaline on level 2
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jon_slider
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thanks.. your AAA tests were illuminating ;-)
any more tests planned?
any more tests planned?
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:LOL:
Nothing definite. I started to consider getting a lithium rechargeable AAA that outputs 1.5V to see if it might run longer. But, without doing math or thinking much, I think that the lithium primary AAA stores more juice. I'm also ready to use the headlamp for an upcoming trip, so I likely won't do any further testing until at least November.
jon_slider
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those are interesting
glad to hear you will have a chance to take the light on a trip
enjoy!
The H53Fc N is such a cute litte light
