G3 and 17500's... Couple quick questions

[aussiebob]

I wanna whack a set of 17500's into my G3, ive read previous posts and people say its a good set up.

I love the output, 105lumens (seems more like 250), but it costs me alot to run, i replace primaries after 30-40 min, it drops off too much after that.

On the standard p90 lamp....
Any idea on runtimes for 17500's ?????
Would they go dull steadily or drop off faster or slower than primaries ????



Thanks for any help

 

[Sgt. LED]

You ought to get less voltage sag.
Drop off in output or taper depends on cells - you will use protected right!? If so the cell's protection may offer a decent regulated *like* output curve. Good question!
Runtime will probably be 50 minutes but I am not 100%.


Now that you posted this it's got me thinking I need 2 17500 cells for my C3! Curses you!:nana:

 

[aussiebob]

You ought to get less voltage sag.
Drop off in output or taper depends on cells - you will use protected right!? If so the cell's protection may offer a decent regulated *like* output curve. Good question!
Runtime will probably be 50 minutes but I am not 100%.


Now that you posted this it's got me thinking I need 2 17500 cells for my C3! Curses you!:nana:

Prob will use protected if i can find them for the right coin.

Thanks for your help

 

[mdocod]

everything you need to know:
http://candlepowerforums.com/vb/showthread.php?t=161536

teaser:

Cell configuration: 2x17500

Bulb Options:
LF D26 ES-9: 7W, 115 - 75 lumen in 73 minutes
LF D26 SR-9: 9W, 160 - 100 lumen in 51 minutes
LF D26 HO-9: 12W, 215 - 132 lumen in 40 minutes
LF D26 EO-9: 15W, 268 - 162 lumen in 30 minutes
SF P90: 9W, 151 - 94 lumen in 52 minutes
G&P G90: 9W, 151 - 94 lumen in 52 minutes
G&P D26 7.4V "DX 10W xenon": 9W, 153 - 95 lumen in 52 minutes (guess)
G&P D26 7.4V "DX 15W xenon": 10.5W, 175 - 108 lumen in 46 minutes (guess)
Pathfinder P90: 10W, 165 - 102 lumen in 47 minutes
WE D26 9V: 10W, 175 - 108 lumen in 46 minutes
Pila GL3 LA: 10W, 175 - 108 lumen in 46 minutes

Body Options:
Leefbody 2x18500 w/C tail and head, +SF compatible tail-cap/bezel. +++
Surefire [G2, 6P, C2, Z2, G2Z, M2] +1 cell extender ++(some extenders fit 17mm cells, some don't)
Surefire G3, 9P, C3, +++
Wolf-Eyes 9 series Raider (non-turbo) +++
Ultrafire/Superfire 3 cell: WF501C, WF502C, ++(some rare UF heads don't fit LF lamps)
Cabellas XPG 9V 3 cell +++
G&P 9P, T-9 +++
Pila GL3 ++

 

[aussiebob]

everything you need to know:
http://candlepowerforums.com/vb/showthread.php?t=161536

Thanks for the link, never knew that thread existed, very helpfull.

Those runtimes are much greater than i was expecting

 

[mdocod]

those particular runtimes are based on estimates that are based on real discharge tests of AW brand protected 17500 cells done by SilverFox here on the forums. So to get those runtimes, I highly recommend the AW cells.

 

[socom1970]

Hey Aussie!!!!

The discharge curve is much flatter with the Li-Ions. It kind of mimics being a regulated light. Runtime should be about the same or a bit better, depending on the quality of the cells you use. The only real drawback to the protected rechargeables (my Pilas, anyway...)is that they don't tail off as they die in your incan. They go into overdischarge protection mode and shut off instantly, leaving you in the dark. I notice my 9P and other lights will noticeably dim shortly before the blackout happens. I use the Pila 150s and 168s cells (Pila 300s and 600s equivalent) so I don't know if the AW cells behave differently...

 

[Tomcat!]

Aussiebob, make the change. You won't regret it. Thanks to the awesomely detailed advice provided by Mdocod in answer to a thread of mine, I switched to using 17500s (in my case Pila brand) in my G3 and 9P about two weeks ago and haven't looked back. I used to be very sparing about how I used these lights because of the costs involved with primaries which eventually meant I worried too much about it and gradually stopped using them, which is a shame. Now I'm liberated from the cost worry so I can use them as much as needed. I haven't yet reached the point where they run out of juice so I can't tell you how long they will last, but now I just swap to the spare 17500s I carry the moment I think the light looks dimmer, because of course I know I can just whack 'em on the charger at the first opportunity. The real practical advantage is that by charging regularly, you always have light at peak power, rather than putting up with diminishing light levels just because you want to squeeze every last photon out of those precious primaries you've paid for. I'm currently EDCing the 9P with a P90 lamp at work where I would normally have a Fenix P3D R100. So far I reckon I get 3 good working days of light before I think I see a slight drop off, so I change cells on the morning of the fourth day regardless of whether the cells are actually low or not. The 17500s have given this torch a new lease of life because I would never have considered it suitable for my work needs on primaries. Obviously you should acquaint yourself with the safety aspects of using Li-ions and buy only quality protected cells, but other than that you're good to go. Another bonus that Mdcod pointed out is that higher output lamps (like Lumens Factory) also become a realistic possibility. The man he say not the P91 though!
(The gospel according to Mdocod will steer you on a righteous path! :bow
Make the leap and save money.

 

[Sgt. LED]

 

[jumpstat]

You will enjoy your lights more when there is 'GUILT FREE LUMENS'.....

 

[aussiebob]

Thanks for the help everyone

Ill be enjoying guilty free lumens very soon:twothumbs