Nice light. Just know that p60 won’t last long on the two 3.0v rcrs
What are you toting today?
- Thread starter bigburly912
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Blade weight ratio on that manix is perfect. Buddy has one and it’s definitely a solid knife
ViperaPiper
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Thanks! But why is that? Isn’t the voltage regulated to 3.0 volts like on the primaries? I know the bulb is supposed to be a 5 volt one and driven at 6 but why would the rechargeables have a different effect?
Keeppower 3v are 1000mah each
CR123 Primary are around 1600mah each
Edit: If speaking of runtime
CR123 Primary are around 1600mah each
Edit: If speaking of runtime
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Because primaries don’t put out 3v. On a p60’s 1A load, they’re 2.5v a cell. So your 5 volts. The regulated lithium ion will be 3v under load. So 6v total. So you’re overdriving by about 20%. Which is quite a lot for an already hard driven bulb
I can’t say for sure how bad it’ll be, but another member here claimed about an hour of use before their brand new p60 popped
ViperaPiper
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I really didn’t know that about primaries. Always thought that because they were lithium they had a pretty stable voltage maintaining. And I was wondering why it is so bright! But what reduction in lifetime are we talking here?
Lithiums don’t really have a stable voltage on discharge. Lifepo4 does. But lithium ion gradually decreases as they drain. So do lithium primary cells. Here is a normal 16340
Here is a graph for a primary. Look at the purple line. That’s 1.0a. It also steadily falls
As far as how long it’ll last, it could pop at any time. There’s not really a way to know
Both graphs were taken from www.lygte.com hosted by HJK
Here is a graph for a primary. Look at the purple line. That’s 1.0a. It also steadily falls
As far as how long it’ll last, it could pop at any time. There’s not really a way to know
Both graphs were taken from www.lygte.com hosted by HJK
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Malkoff VME with M31W. Really enjoying this simple single output drop in. Runs great on CR123 or single AA batteries
bigburly912
Flashlight Enthusiast
Last time I tried it I got about 20 minutes on a pretty hard core use firefly hunt with my 7 year old haha.
Malkoff M61WLL and a big ole fat plumber o'ring will make er go like new if need be.
ViperaPiper
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That’s a shame. Is it better to underdrive it with a 16650 then? There’s no way I am running primaries even though I am almost never keeping it on for more than a few minutes.
If you were only using it at a few minutes at a time set of primaries will last a while. Do you have a way to get them cheap I would just use those. That bulb is meant to run two primaries. On a single 16650, You will probably be at around 20 lumens, and it will be quite orange. P61 will be a little bit better though. That’s a 4.4v bulb so will not be underdriven as much. My recommendation is this. http://kaidomain.com/3_7V-12W-or-15W-Xenon-Bulb-Drop-in-26_5mm.
It draws 1.8A on a single cell. Very white and bright. And lasts 10s of hours. For the price they’re incredible
It draws 1.8A on a single cell. Very white and bright. And lasts 10s of hours. For the price they’re incredible
ViperaPiper
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Thanks for the knowledge! I have a few other Surefires so it definitely is a very valuable piece of advice. Especially considering that these older flashlights are like classic cars which are no longer officially supported but you run anyway for that special experience.
Shiny things:
-Reylight Ti Lanapple 519a 3000k
-Peak SS Eiger Ultra 219b 4000k
-Reylight Ti Lanapple 519a 3000k
-Peak SS Eiger Ultra 219b 4000k
Shiny…….
Megalamuffin
Enlightened
I only got a few hours out of a new p60 that I used with two 3v rcr123’s.
IMA SOL MAN
Flashlight Enthusiast
I think SF admonished not to use rechargeable batteries with their incandescents, didn't they?
