I have a Surefire 9P that I have had for 6-7years with a P91 lamp assembly which SF rated for 200LM for 20 min. I am looking to mod it to something possibly brighter but definitely more energy conscious. SF says not to use 16340s with the halogen bulb, and I haven’t found a 18650 thay will fit in this light. Currently it takes 3 CR123. I am not opposed to using 16340s if I can find a decent LED conversion lamp. I saw some on E-Bay but am not sure of the specs or quality. Any suggestions would be greatly appreciated.
Thanks
Also I recently added a Nitecore P12 to my lot and initial impressions are good, and if anyone knows how to mod a Spyder III Arctic laser that would be great as well.
if you want to get your surefire 9p bored to accept 18mm diameter cells (9p works good running 2x 18500 batteries, 8.4v), you can send it to oveready by signing up in that thread.
now - what about drop ins? well there are many to chose from my friend
those are the new eagle tac sportac dropins - they will work with either 3x cr123 batteries (like the regular p91 lamp) or 2x 18500 if you get your 9p bored. they are single mode only, on and off but are reasonably priced in my opinion.
there are many malkoffs to choose from that will run on both 2x 18500 and 3 x cr123 - they are also single mode
generally speaking the m61s will run for longer than the m91s but produce less lumen… the m61L, LL etc will make less light but last longer
There are also other options like having your own dropin built by vinh or nailbender on cpf
I dont want to overwhelm you - what exactly are you looking for? long run time? high output? multiple modes? are you looking for a cheap simple ebay dropin led replacement? how much do you want to spend?
I have a C3 centurion which has a thrunite drop in and for batteries I use the 3 volt tenergy rcr 123 kit which includes a charger and 4 batteries.Truth be told,the drop in is not so great and has PWM on low with a nasty green tint.It was a decent upgrade without having the host bored out.
Thanks for the info! I am looking to spend about $50 or less for the mods. I spent around $100 for the light and lamp years ago. I am looking for the best combo of brightness/runtime/cost within reason. I would like run time of an hour or more. I am not opposed to running 16340s. I like the 12P idea because the 9P is too long for a single 18650 and too short for 2. I don’t really care to have multiple modes, my Nitecore P12 takes care of that if needed.
How much difference will the voltage be for brightness? I am an electronics tech, so I understand the current and voltage relationship just not how it will relate to brightness. Since 16340 and 18650 are both available in 3.7v, 4x 16340 is twice the voltage of 2x 18650.
How long is the tube? What about a 16650 cell?
And a generic p60dropin for maybe 10-20$….
And you should think of that you can get a nice 18650 light fully assembled and bright like the sun for under 20$ these days.
600lm+ for an hour and modes to increase the runtime…
I actually just bored my 9P this evening myself and it turned out great. I just need to decide on a lamp and if i want 2x 18500 or 2x 18650 with an extender.
I just can’t seem to find any 18500 with a decent AH rating. The 18650s are not that much longer than 18500, but have more than twice the capacity.
