Drywolf
Flashlight Enthusiast
Love my Haiku!
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What is the voltage on the SF primaries you used? If it's below ~2.8V, the batteries will have so little current-generating capacity they won't be able to properly power the light even if the voltage is high enough.
Well, yes. Testing current is important too, if one has a multimeter that can handle multiple amps. I got one that can handle 10 amps and it only cost $10 or so. However, amperage is dependent on voltage and resistance though, so high voltage implies high amperage assuming one isn't attempting to push electricity through a known insulator. That being said, the reason I specified 2.8V is because I've noticed my 123 primaries tend to fall off a cliff in terms of amperage when the voltage is lower than ~2.8V. It's a good guesstimate for when it's time to toss the battery.Guys, sorry for butting in but thought it might help in some small way. Testing a 123 cell by voltage is notoriously unreliable. The better test method would be to test its ability to push current for a very brief instant. One can do this in a pinch by setting a multimeter to the 10A (sometimes 20A) scale and shorting the cell FOR A FRACTION OF A SECOND: as quickly as you can note the reading, stop! One would hope to see a reading of 7-10A though the specific value will vary by brand of cell.
I agree. I sent a Haiku in for service once and it turns out my emitter combined with my current-sensing resistor just happened to add up to abnormally low output. Don replaced the current-sensing resistor and all was well....The Haiku design is solid. Your particular Haiku is funny.
I'd be willing to bet that when you send it back, Don finds something fundamentally wrong with it...fixes and returns you the Haiku you expected to get and Don thought he originally sent.
Well, yes. Testing current is important too, if one has a multimeter that can handle multiple amps. I got one that can handle 10 amps and it only cost $10 or so. However, amperage is dependent on voltage and resistance though, so high voltage implies high amperage assuming one isn't attempting to push electricity through a known insulator. That being said, the reason I specified 2.8V is because I've noticed my 123 primaries tend to fall off a cliff in terms of amperage when the voltage is lower than ~2.8V. It's a good guesstimate for when it's time to toss the battery.
Nope don't think so, unless you use a 17670 cell in the 2x123 pak if you could find one that fits.I got my Haiku XP-G R5 today. If i buy a 2 x CR123 Pak could i use it without damage the my Haiku?
Thanks for help!
Personally, the single cell Haiku with the 185 lumens on high is more than enough. Of course, there are many more other lights offer much higher output. Pop in a R123 cell in the Haiku for guilt free lumens..@jumpstat thank you!