Surefire modification

jcmack

Newly Enlightened
Joined
Oct 8, 2021
Messages
5
Location
NW Indiana
Hello, this my first post on Candlepower although I've referenced the site many times in the past. Any thoughts on my post are appreciated.
Thanks, Jim
I found 6 Surefire flashlights, all non working, in a drawer where I put them probably 10-12 years ago, maybe longer. I got three of them working by swapping tail caps and buying some Cree upgrade lamps for pretty cheap. Also got some free parts from Surefire. I've got a fourth Surefire that uses 4-123's with a 12V lamp. I want to switch to 3-123's and a 9V lamp in this flashlight. Suppose I take brass or copper rod cut to the length of a 123 battery, coat it with heatshrink so its electrically isolated except for the ends and use it to take up the space of a fourth battery, giving me a working 9V flashlight. Should work, no?

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novice

Flashlight Enthusiast
Joined
Apr 19, 2006
Messages
1,003
jcmack, another option would be to use 2x16650 rechargeable Li-ion cells with something that runs on 7.4-9 volts. That way you wouldn't have to use a dummy cell, or be running through primary cells. That's what I do with my 12ZM. I realize that involves investing in a good charger and 16650 cells if you don't currently have any. It is nice using rechargeables. Years ago, one of the members coined the term, "guilt-free lumens".
 

jcmack

Newly Enlightened
Joined
Oct 8, 2021
Messages
5
Location
NW Indiana
One of the lights I own is one I bought from Cabelas a long time ago. It appears to be a rebranded Surefire using 4 cr123's. I have a Surefire C3 Centurion and lamp head and tail cap interchange with the Cabelas flashlight. Swaping those parts and adding a 4th battery makes it work. 9V vs 12V is the reason I tracked down (with help here) a dummy cell. The original lamp head and tail cap are shot and I've got parts coming. Are these flashlights cosidered Surefire quality?

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cynical

Newly Enlightened
Joined
Mar 3, 2008
Messages
5
Regarding the Cabela's quality: keep in mind that the critical parts are the lamp and the tailcap/switch. You're swapping those with better parts already. The body is just a threaded tube. If the dimensions are right and everything fits, and it works when you turn it on, you shouldn't need to worry about the body quality. Use a good switch, put a decent drop-in in a good bezel, and use good batteries, you're good to go.
 
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