What are you toting today?

[vicv]

I'm carrying a brand new G2Z that must have been sitting in a local gun store for 15+ years. Keeppower RCR123As and a stock P60. A little worried how the rings have deteriorated in those years though. We'll see!

Nice light. Just know that p60 won't last long on the two 3.0v rcrs

 

[cyberhobo]

Emisar D1 FC-40 R9050 5000K

 

[ilikeguns40]

Emisar D1 FC-40 R9050 5000K

View attachment 52704

Blade weight ratio on that manix is perfect. Buddy has one and it's definitely a solid knife

 

[ViperaPiper]

Nice light. Just know that p60 won't last long on the two 3.0v rcrs

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?

 

[ilikeguns40]

Keeppower 3v are 1000mah each

CR123 Primary are around 1600mah each

Edit: If speaking of runtime

 

[vicv]

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?

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]

Keeppower 3v are 1000mah each

CR123 Primary are around 1600mah ea

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

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?

 

[vicv]

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

 

[ilikeguns40]

Malkoff VME with M31W. Really enjoying this simple single output drop in. Runs great on CR123 or single AA batteries

 

[bigburly912]

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?

Last time I tried it I got about 20 minutes on a pretty hard core use firefly hunt with my 7 year old haha.

 

[bykfixer]

I'm carrying a brand new G2Z that must have been sitting in a local gun store for 15+ years. Keeppower RCR123As and a stock P60. A little worried how the rings have deteriorated in those years though. We'll see!

Malkoff M61WLL and a big ole fat plumber o'ring will make er go like new if need be.

 

[cyberhobo]

Manker E04 4500K - Solo Liner Lock

 

[ViperaPiper]

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 16340View attachment 52741
Here is a graph for a primary. Look at the purple line. That's 1.0a. It also steadily falls

View attachment 52742
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

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.

 

[vicv]

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

 

[ViperaPiper]

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

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.

 

[ilikeguns40]

Shiny things:
-Reylight Ti Lanapple 519a 3000k
-Peak SS Eiger Ultra 219b 4000k

 

[vicv]

Shiny things:
-Reylight Ti Lanapple 519a 3000k
-Peak SS Eiger Ultra 219b 4000k
View attachment 53286

Shiny…….

 

[Megalamuffin]

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

I only got a few hours out of a new p60 that I used with two 3v rcr123's.

 

[IMA SOL MAN]

I only got a few hours out of a new p60 that I used with two 3v rcr123's.

I think SF admonished not to use rechargeable batteries with their incandescents, didn't they?

 

[scalpel_ninja]

Novatac at the park this evening.