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Thread: Build yer own "Battery Vampire" with a P60

  1. #241
    Flashaholic* angelofwar's Avatar
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    Default *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    Awesome scoot! Glad to see this idea still alive and kicking!

  2. #242
    Flashaholic* S1LVA's Avatar
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    I just saw this! My soldering iron is MIA right now but I am a modern-day MacGyver

    A little scotch tape and tinfoil along with an LED harvested from a keychain light... 10 mins later and I have a sick little light engine!

    I'll make a better quality one someday, but for now this is too cool!

    S1LVA
    I used to be afraid of the dark. Now, the dark is afraid of me.


  3. #243
    Flashaholic* hopkins's Avatar
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60


  4. #244
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    Bump for a great old timey thread. Even I was able to do this mod! So there is hope for all newbies out there. Give it a go.

  5. #245
    Flashaholic* RobertMM's Avatar
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    Made one with a LED harvested from a dead blackberry phone(the one used for camera flash). Used a Solarforce lamp assembly, had a horrible beam despite being adjustable for focus so I had to frost the LED dome with 2000grit sandpaper.
    Result: very floody and smooth beam with just a touch of a hotspot. Lights up on a CR123 primary measuring 2.5 volts, about 1 lumen compared to my Quark QTA .25 kumen mode.
    What I like about it is that with a fresh primary over 3.2volts, Its brighter(ceiling bounce) than the 25 lumen mode on the Quark.
    Seems to consume very little power too. I like it way better than my first one with a 5mm led. More versatile this way.

  6. #246
    Administrator Kestrel's Avatar
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    A good thread & bumpworthy.

    A while back I built up a couple more P60's in such a fashion, but instead of using the older-style 5mm LED's, I used the newer 60 degree floody 5mm LED's.

    Worked fantastic, great beam quality and a very good hotspot since the P60 reflector is now catching a significant amount of light from those floody 60deg LED's.

  7. #247
    *Flashaholic* Illum's Avatar
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    Quote Originally Posted by hopkins View Post
    err, why are you draining an eneloop?

  8. #248
    Flashaholic* RobertMM's Avatar
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60



    Here's mine.
    Ongoing runtime test with two Sony alkaleaks in a SF G3, after 20 hours output down to 5 lumens compared to my QTA, from initial output of around 25.

  9. #249

    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    I would love one of these but my skills at making one are probably less than what is required and the original posts pictures are gone forever. Anyone have one they'd be willing to part with/sell? Would prefer one with an ultra low power consumption red led. Thanks and hope people will relive this thread resurrection.

  10. #250
    *Flashaholic* Illum's Avatar
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    A D26 with a low consumption LED like a 5mm? or an SMT type like an XP-E?

  11. #251
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    Im going to have to try this...
    Prometheans #253

  12. #252

    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    Sorry, to bump an old thread. Just wondering has anyone try this mod using surface mount LED?

  13. #253
    Flashaholic* nein166's Avatar
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    Default Re: *Beamshots-Post #36*Build yer own "Battery Vampire" with a P60

    Quote Originally Posted by firefly99 View Post
    Sorry, to bump an old thread. Just wondering has anyone try this mod using surface mount LED?
    Well if you use a low current consuming emitter not a power emitter it could work. I don't think there would be an advantage and doubt it would work with the reflector from an original P60. I thought about doing this with a burnt out P60 LED drop-in with a fried driver but didn't have a low forward voltage mounted LED that would sip the juice.

  14. #254

    Default Re: Build yer own "Battery Vampire" with a P60

    Quote Originally Posted by nein166 View Post
    didn't have a low forward voltage mounted LED that would sip the juice.
    Is a forward voltage of 1.8~2 consider low ? I could send you a few smd red led, when I receive the next shipment of 2000 led, if you PM me your address.

  15. #255
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    Default Re: Build yer own "Battery Vampire" with a P60

    The new Yuji 5mm's work nicely for this. I put one in a sacrificial P60 today, and am running it in a stubby "G1" Nitrolon Surefire. Suprisingly nice beam, and I'm sure heat won't be an issue... I'd post a pic, but Photobucket is Photobucket, and I don't have another host site yet...

  16. #256
    Flashaholic* nein166's Avatar
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    Default Re: Build yer own "Battery Vampire" with a P60

    Yeah right what's the deal Photobucket you messed up all the threads.
    If you have Yuji to spare I'd buy some off you at Kartracer's FSM if your coming

  17. #257
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    Default Re: Build yer own "Battery Vampire" with a P60

    Nein- I'll be sure to bring you a few. I've got 3200k 45° and 60°

  18. #258
    Flashaholic* nein166's Avatar
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    Default Re: Build yer own "Battery Vampire" with a P60

    Cool, the noise from screws and cogs turning will make it hard to sleep

  19. #259

    Default Re: Build yer own "Battery Vampire" with a P60

    Older thread, I know. Making a few with yuji LEDs as cr123 vamps and blackout use. Are we keeping the grey plastic base in place? Seems like my LED leads are a little short- maybe *just* long enough to solder but I certainly can't wrap them.

    What is the trick to getting solder to stick to the steel spring? Is my 40w iron just too weak or is there something I don't know?

    I plan to use these in an L2M setup for either 1xcr123 and/or in an L2M setup with an extender to run 2xAA. Curious, though, if anybody has used resistors to run them off 2xCR123? Using the above linked calculator it would take 140ohms and they recommend running a 150ohm resistor. Any reason this wouldn't work?

  20. #260
    peter yetman's Avatar
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    Default Re: Build yer own "Battery Vampire" with a P60

    Are you using soldering flux?
    P
    "O frabjous day! Callooh! Callay!" He chortled in his joy.

  21. #261

    Default Re: Build yer own "Battery Vampire" with a P60

    Yes but maybe there is a better type? I'm using the same tub I got from Radioshack about 10 years ago which I have used on all types of electronics to date.

  22. #262

    Default Re: Build yer own "Battery Vampire" with a P60

    I kept the plastic base. No need to "wrap" the leads, just bend one to touch the smaller spring and the other on the opposite side in a way that it touches the outer spring.

    The smaller spring touches the battery lead at the positive end of the battery. The larger spring touches the body of the light to act as the ground.


    One lead touches larger spring


    Other lead touches smaller spring
    This one is fugly, but another one turned out nice but leads could not be seen by the camera.


    Mutt light
    Solar Force head, fivemega body, Laser Products tailcap.
    Last edited by bykfixer; 01-07-2020 at 03:50 PM.
    John 3:16

  23. #263
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    Default Re: Build yer own "Battery Vampire" with a P60

    Agreed, I've never soldered one. Just bent the legs on the 5mm led, and pushed the SF springs back in place. Makes it easier to replace the LED when you accidentally grab that assembly and drop it into a 6P with two 123's in it. Ask me how I know... As an aside, the emitter did actually work for a minute as I sat there and wondered what was wrong with it...
    The TK20. Yes, it still rocks- WoodsWalker

  24. #264

    Default Re: Build yer own "Battery Vampire" with a P60

    "Hmmm, wonder why it's smoking like that?" "zzzt". lol

    If I recall correct some folks were testing Yuji's to see how much and for how long they could go with various amounts of current, and how bright they got. I turned away from the computer screen as torture makes me squeemish.
    John 3:16

  25. #265

    Default Build yer own "Battery Vampire" with a P60

    Wow I’m really surprised how well this turned out. Even more surprised that just bending the led leads under the spring seats is working and holding up to multiple drops.

    Interestingly the p60 reflector seems to be working very well with my yuji sample. Not 100 percent sure which beam profile this led is but looking at the pattern from the p60 it’s developed a nice tight hotspot with broad, bright spill. And excellent task light and really lights up a room despite its low output running 2AA...


    At about 1 foot on a beige wall
    Last edited by Buck91; 01-12-2020 at 08:35 PM.

  26. #266

    Default Build yer own "Battery Vampire" with a P60

    And at about 1 meter. FWIW the beam appears completely uniform to my eye, the rings are somehow a product of my iPhone camera.



    Sent from my iPhone using Tapatalk

  27. #267
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    Default Re: Build yer own "Battery Vampire" with a P60

    Buck91- Nice! And it'll run a LONG time...
    The TK20. Yes, it still rocks- WoodsWalker

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