Surefire KL4 SSC P7 Direct Drive Mod

[brighterisbetter]

Where can i read some more about this new type of rechargeable???:candle:

here you go :thumbsup:

 

[toby_pra]

Many thx my friend...:naughty:

Will,
what would be the advantage of using there new 16430's instead of
the older AW's Rcr123?

 

[TexLite]

Now thats what I call a "backup"!

Very cool DZ.

Many thx my friend...:naughty:

Will,
what would be the advantage of using there new 16430's instead of
the older AW's Rcr123?

I'm not Will,but the short explanation:

They'll hold they're voltage under this high of a load and won't .

This high of a current would likely kill an RCR123 Li-ion or some part of your body.

-Michael

 

[brighterisbetter]

Many thx my friend...:naughty:

Will,
what would be the advantage of using there new 16430's instead of
the older AW's Rcr123?

My understanding is that for a typical LiIon cell, it's considered unsafe to discharge at a greater rate than 2C, and only 1.5C for RCR123's. The LiMn (IMR-16340) cells can handle discharge rates of greater than 5C I believe, and in a 18650 size, over 20C!!!

 

[toby_pra]

My understanding is that for a typical LiIon cell, it's considered unsafe to discharge at a greater rate than 2C, and only 1.5C for RCR123's. The LiMn (IMR-16340) cells can handle discharge rates of greater than 5C I believe, and in a 18650 size, over 20C!!!

Many thanks for explaining...:naughty:

 

[270winchester]

email sent.

Very nice job.

 

[Team Member]

:bow:


I need one...

Very nice done darkzero!!

 

[brighterisbetter]

Yes very nice Will. Should you ever decide to take up modding again, I'd love for you to do this to my KL4-BK.

 

[brighterisbetter]

PM sent with question regarding Vf and direct-drive compatibility.

 

[pwx234]

just built a ssc 7 led in a p60l head for my surefire G2 it's direct drive and it's pretty bright, thanks for your kl4 head pictures it inspired me

how do you post pictures from your computer on this site??

 

[darkzero]

just built a ssc 7 led in a p60l head for my surefire G2 it's direct drive and it's pretty bright, thanks for your kl4 head pictures it inspired me

how do you post pictures from your computer on this site??

Careful using a direct drive P7 drop in a G2. I did a P7 drop in for someone in the same light. Running direct drive it gets very hot very quick & because of the lack of heatsinking it has as is you can overheat the P7 easily. Since the G2 is composite you will not get feedback on how hot it's getting.

To post images you will need to up load your pics to a web host. Photobucket, imageshack, & flickr are a few free ones. Then use the IMG tages to post them.

 

[pwx234]

ok thanks

I only use it for short period of lighting at the time so it doesn't have the time to get hot

your mod is awesome by the way

mine is in a electric tape version still

 

[bigchelis]

Just wanted to let folks know that this KL4 at 3 minutes gets hot with only 2.5A at the tail. Fortunately; I think this illustrates the awesome heat transfer the KL4 bezel offers.

Here are the OTF readings:
Surefire KL4 w/ P7 DD___________Mod by DarkZero on KL4 bezel_____1 IMR 16340 w/2.5A_______________ 484.6____________1 sec
Surefire KL4 w/ P7 DD____________ Mod by DarkZero on KL4 bezel_______1 IMR 16340 w/2.5A________________ 419.2____________30 sec
Surefire KL4 w/ P7 DD____________ Mod by DarkZero on KL4 bezel_______1 IMR 16340 w/2.5A________________ 393.8____________1 min
Surefire KL4 w/ P7 DD____________ Mod by DarkZero on KL4 bezel_______1 IMR 16340 w/2.5A________________ 378.5____________2 min
Surefire KL4 w/ P7 DD____________ Mod by DarkZero on KL4 bezel_______1 IMR 16340 w/2.5A________________ 366.2____________3 min

https://www.candlepowerforums.com/posts/3273709#post3273709

 

[GarageBoy]

Real curious why you are not a fan of underdriving for efficiency
::laugh::
What driver can I use in there to run it off one Li Ion efficiently?

 

[bigchelis]

If I am not mistaken the L1 and L4 bezels do not have room for a driver. That is why most L1 or L2 mods that have P7's or MC-E are direct drive.

You can kinda control the current by choosing less capable (small size) batteries. IMR 16340 deliver 2.5A, bigger cell more current, and even bigger cell more current.

It would be kinda cool to have a P7 with a 1.4A driver in this little hosts. Less lumens, less heat, but more runtime

 

[GarageBoy]

The KL4 (L4's bezel) originally had a driver
The L1 and L2 have the driver in the body, you only get DD when you gut the body or use it on a standard E series body

 

[darkzero]

Wow, thank you bigchelis. Never expected that high into the 400s, considering the reflector is sputtered too. I guess this would mainly affect spot & a lux meter rather than an IS. I figured high 300's max & not for very long.

If I am not mistaken the L1 and L4 bezels do not have room for a driver. That is why most L1 or L2 mods that have P7's or MC-E are direct drive.

It would be kinda cool to have a P7 with a 1.4A driver in this little hosts. Less lumens, less heat, but more runtime

IIRC this is the only one I did DD (at the customer's request). Stock KL4 driver delivers 700-800ma. I've done more with modified FLuPICs like this.

What driver can I use in there to run it off one Li Ion efficiently?

Most KL4s I've personally done are with modified FLuPICs, the stock driver, & modified stock drivers like in the link above. Also did a KL4 with a K2 TFFC & SOB1250.