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Thread: 3AA to D cell battery holder.

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    Flashaholic* ElektroLumens's Avatar
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    Default 3AA to D cell battery holder.

    Remeber this battery hoder we were all looking at a while back?



    Well, an associate of mine found it's source. However, they insist on bogarting the thing [img]graemlins/icon13.gif[/img] . So, what to do? We are going to open up a mold and make them ourselves! [img]graemlins/icon14.gif[/img] Should be available in about a month. [img]images/icons/grin.gif[/img] Should be priced at approximately $2.50 to $3.00 each.

    This battery holder holds 3 AA batteries, and is exactly the same size as a D cell battery. So two will fit perfectly into a 2D flashlight for 9 volts, or 7.2 with rechargables. You could use 3 or 4 or 5, whatever, to get the voltage you need to do whatever. [img]images/icons/grin.gif[/img]

    Working on behalf of all CPF members, to get the parts we need, to do the mods we want. Actually I really want them for a 5 watt flashlight I'm working on, but will share them with anyone who wants them. [img]images/icons/grin.gif[/img]

    So how about a 2D *ag*ite, using two of these battery holders. Mount a 5W of your color choice, and use the new 30mm optics. Sounds nice, huh?

    Whadya think? [img]graemlins/winkie.GIF[/img]

    Wayne J.

  2. #2
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    Default Re: 3AA to D cell battery holder.

    Now if only somebody could easily make a 4AA to D holder. Lol. Hmm, I still have some 6AA holders...unfortunately no D cell lights any more. Wayne, THANK you for taking the initiative here! I'll probably be buying a few in case I want to mod a 3 D cell light that I wouldn't be able to mod with a 6 cell holder alone...maybe with a 6 and a 3..not sure what to do with the 10.8 volts though. I am sure I'll figure out something.

    Spud

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    Flashaholic* ElektroLumens's Avatar
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    Default Re: 3AA to D cell battery holder.

    Originally posted by Tater Rocket:
    Now if only somebody could easily make a 4AA to D holder. Lol. Hmm, I still have some 6AA holders...unfortunately no D cell lights any more. Wayne, THANK you for taking the initiative here! I'll probably be buying a few in case I want to mod a 3 D cell light that I wouldn't be able to mod with a 6 cell holder alone...maybe with a 6 and a 3..not sure what to do with the 10.8 volts though. I am sure I'll figure out something.

    Spud
    <font size="2" face="Verdana, Arial">Well, 4AA's would be 6 volts (or 4.8 in rechargables.) An off voltage for the Luxeon Star. Of course, for the HID mods, this would be good.

    Wayne J.

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    Default Re: 3AA to D cell battery holder.

    Yeah, I know :-) I'm not planning HID (too high cost) so much as 20-35 watt MR16's in a 3D mag [img]images/icons/smile.gif[/img] 4D is a bit long, 3D would be great. Plus, for $20 you can get one of those and a Mini-*ag (for even more mods or selling to recoupe a bit of cost).

    Spud

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    Default Re: 3AA to D cell battery holder.

    2D-sized with a 5W-LS and some kind of regulation to it ... I'd be in!
    bernhard

  6. #6

    Default Re: 3AA to D cell battery holder.

    Put me down for 8 of the holders if you can keep the price close to $2.50 each.

  7. #7
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    Default Re: 3AA to D cell battery holder.

    Electrolumens:

    I have one of these battery holders. As Mr. Bulk reported, they are a little too wide for current Mag D lights. They fit into my Brinkmann D, Nordic D, Dorcy D, Garrity D, SL-20X, and older Mag Charger bodies. They seem to be the same diameter as my 3V LiSO2 7.5 Ah lithium cells.

    They also fit into Dorcy/Garrity adapters for 4D cells into one lantern cell.

    Maybe you can refine the mold to shrink the OD a little. The contacts on the original are fussy enough that I experience intermittent open failures, particularly with rechargeables.

    I'm interested in at least a dozen at the $2.50 @ since I have lots of lights they fit. Many people will be unhappy because Mags are too tight.

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    Flashaholic* StoneDog's Avatar
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    Default Re: 3AA to D cell battery holder.

    Wayne,

    If you're making the mold the final product will be sized for a Mag, right?

    Put me down for at least 4 of them.

    Jon

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    Default Re: 3AA to D cell battery holder.

    Wayne,
    Definitely interested in some of these if you get them produced. Put me down for at least 4 of them as well.

  10. #10

    Default Re: 3AA to D cell battery holder.

    They should fit in the "older" mags (circa 1985) just fine though... Mine is and older one and the ID is bigger. 36mm if my measuring stick is correct. I would like 3 of them but i am overcommitted at this point. Perhaps someone will have some left over in a month or so?

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    Flashaholic Deviant's Avatar
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    Default Re: 3AA to D cell battery holder.

    Wayne,

    I believe that this 3AA to D cell batt is a series configuration. I belive some might be interested in an adapter running these 3 batts in parallel.

    Lester

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    Default Re: 3AA to D cell battery holder.

    (O-o)

    Does anybody besides Brock really want to do 3AA packs in parallel? Most readily purchaseable applications can benefit from doubled voltage more than doubled current delivery capability. Most flashlights have internal resistances that argue against significantly higher currents.

    Besides, use of NiMH AA's can get the current up to 1.0 A and 1.9 A or so before voltage drops to around 1.1 V and 1.0 V per cell, respectively.

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    *Flashaholic* Rothrandir's Avatar
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    Default Re: 3AA to D cell battery holder.

    thanks wayne!

    i think i'll take four when their available [img]images/icons/smile.gif[/img]

  14. #14

    Default Re: 3AA to D cell battery holder.

    i will take four also, assuming the price is around 2.50.
    thanks Wayne

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    Default Re: 3AA to D cell battery holder.

    I will also take two. I don't have a use for them, but I want to support this great offer!

    Thanks Wayne!!

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    Default Re: 3AA to D cell battery holder.

    I'm still on the hunt for a 2D flashlight that will take 3 stacks of 4 AA's (total of 12 AA's. One could then have two sets of 6 AA's, one on each side, supplying 7.2V each. This would be great for a 5W LS or a W/S 01274 7.2V 2.77A 552L lamp. Anyone know of a 2D flashlight that can fit 4AA's in the tailcap? It would still need enough length but most 2D's do. I'm in the process of doing this with my Nordic 2C and 12AAA's. Instead of a battery holder, I'm making a shrinkwrapped battery pack using RC enthusiast methods. It fits beautifully. All you need is a charger that can handle them which I also recently picked up. This one is going to get a 5W LS when they get here.

    Lemlux, do you have any Nordic 2D's?

    StreamChucker

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    Default Re: 3AA to D cell battery holder.

    3 AA in a D cell,
    Now we are talking! A 2D 5 watt LS with Wayne's optics (and the other Wayne's Wizard regulator) would make the perfect retina burn [img]images/icons/grin.gif[/img] [img]images/icons/smile.gif[/img] [img]images/icons/grin.gif[/img]
    Wayne, are you planning on a regulated option?

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    Default Re: 3AA to D cell battery holder.

    Ya, I think I am the only crazy one wanting this in a parallel config (going in corner and staring at floor). Actually I have managed to get 4 8AA holders in the same space as the 8 D were, works great. But the other two lights have to be D cell sized holders so I am stuck using the AA to D adapters.

    Someday someone will make them, and I will be there to buy all 16 of them [img]images/icons/smile.gif[/img]

  19. #19
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    Default Re: 3AA to D cell battery holder.

    Streamchucker:

    No Nordic 2D's. I have 5 Nordic 3D's, 4 Nordic 3C's, and 8 Nordic 2 C's. As you know, I got them on EBAY for $1 @ for the 2C's, $3 @ for the 3C's, and $5 @ for the 3D's. (shipping averaged between $1.50 and $2.00 per light.)

    I think I may have told you that I can fit sub C's in the C tailcaps unlike Mags which won't. I can't fit a D cell in the D tailcap or a C cell in the C tailcaps.

    Please show pics of your battery pack.

    12 AAA's will give you 1500 mAh at 7.2 V in serial / parallel. Interesting concept for a 2C.

    I've just ordered (or tried to order) some Copia Lithium-ions. The 16.5mm by 50 mm LRB-150B's deliver 3.7 V and 1000 mAh. the 16.5mm by 68 mm LRB-168B's deliver 3.7 V and 1400 mAh. I can easily fit two of the longer ones in a 2C. I ordered the 16.5 mm diameter ones so I can use them in Surefires also.

    The 18.5 mm diameter 68 mm long LRB-168A batteries have a capacity of 1800 mA if you want more capacity and want a size that's between A (17mm) and Sub C (23 mm).

    You won't get 7.2 V output driving a 2.77 A bulb at 1.8C. You'll probably voltage drop to around 6 volts.

    I hope to drive a 01274 bulb with 3 of the 3.0 V 7.5 Ah Saft primary Li-SO2 primary D cells discussed in another thread. Voltage drop should be to around 7.6 V. to 7.7 V. I've cut off a dead SF Pxx LA and drilled the center hole to accept a T-2 1/4 bulb. I've then epoxied the SF reflector to the top of the threaded bulb retainer.

    Patty at Carley is now confirming for me whether or not Carley can make custom variants of their 912 PR potted socket with ceramic potting rather than soft plastic potting. The 912 socket is rated for 1.0 amp max and I haven't pushed a 912 socket beyond 1.42 A.

    Back on topic.....
    If I can't arrange for a potted 912 socket, the 3AA adapter will allow me to run some interesting bulbs with current in tthe 1.2 to 1.5 Amp range.

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    Default Re: 3AA to D cell battery holder.

    Lemlux, I was going to use the AAA pack to drive a 5W LS. I want a 2D so I can use 12 AA's in a battery pack to drive the 7.2V W/S bulb. That should give me 4200mah if I use the Sony 2100mah AA's I have coming. I was going to ask you if you thought that would work or should I go to Nicads to make sure it is driven properly without much voltage drop.

    I'm ordering some Copia's too. I picked up a Garrity Stainless AA a while back to fit two of these in for the other 5W LS I have coming. It should give me 7.4V 1000mah or over an hour of run time in a 2AA size rechargeable flashlight. I paid $10 for mine. I see everyone is now talking about them being super cheap at Walmart right now. I may need to go pick up some more.

    StreamChucker

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    Default Re: 3AA to D cell battery holder.

    I'll be interested in several.

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    Default Re: 3AA to D cell battery holder.

    Wayne:

    Any comment on the possibilites of skinnying down the battery pack OD?

    Streamchucker:

    Most higher capacity AA's drop quickly to around 1.1 V at 0.5 C. I think you'll be lucky to get 6.5 V out of that WA 01274 in that 2 * 6AA configuration.

    The 01274 rerates at 382 lumen and 2.614 amps when driven at 6.48 V. I'd use an 01111, and 01315 or an 01148 with that battery setup. I use 01111's driven by a 6 D cell rechargeable pack.

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    Flashaholic* ElektroLumens's Avatar
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    Default Re: 3AA to D cell battery holder.

    Originally posted by lemlux:
    Electrolumens:

    I have one of these battery holders. As Mr. Bulk reported, they are a little too wide for current Mag D lights. They fit into my Brinkmann D, Nordic D, Dorcy D, Garrity D, SL-20X, and older Mag Charger bodies. They seem to be the same diameter as my 3V LiSO2 7.5 Ah lithium cells.

    They also fit into Dorcy/Garrity adapters for 4D cells into one lantern cell.

    Maybe you can refine the mold to shrink the OD a little. The contacts on the original are fussy enough that I experience intermittent open failures, particularly with rechargeables.

    I'm interested in at least a dozen at the $2.50 @ since I have lots of lights they fit. Many people will be unhappy because Mags are too tight.
    <font size="2" face="Verdana, Arial">Oh, right. I just tried one in a Mag and it didn't fit. It does fit in the Blaster, as it has a little larger diameter body. So unless we make it smaller, it would not fit. I'll see about shrinking the diameter a bit. Thanks for the input.

    Wayne J.
    www.elektrolumens.com

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    Flashaholic* ElektroLumens's Avatar
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    Default Re: 3AA to D cell battery holder.

    Originally posted by (O_o):
    Wayne,

    I believe that this 3AA to D cell batt is a series configuration. I belive some might be interested in an adapter running these 3 batts in parallel.

    Lester
    <font size="2" face="Verdana, Arial">These would be in series, at 4.5 volts for alkalines, etc.

    Wayne

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    Flashaholic* ElektroLumens's Avatar
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    Default Re: 3AA to D cell battery holder.

    Originally posted by lemlux:
    Wayne:

    Any comment on the possibilites of skinnying down the battery pack OD?
    <font size="2" face="Verdana, Arial">I'll look into it.

    Wayne J.

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    Default Re: 3AA to D cell battery holder.

    lemlux,

    I guess that would have to make 2 crazy ppl. me and brock [img]images/icons/grin.gif[/img]

    For LED application the parallel configuration would do more harm than good. i was thinking for incandescent and regualted applications there would be longer runtime with a parallel set up, i maybe wrong [img]graemlins/icon3.gif[/img]

  27. #27
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    Default Re: 3AA to D cell battery holder.

    The OD would probably be a big sticking( [img]images/icons/tongue.gif[/img] ) point for quite a few people, perhaps a slightly different design like the one used in these.

    I'm also guessing this will be a direct drive mod? 7.2 (from 6 NiMH) with a resistor would draw a 0.7A current at spec, under the 0.5C discharge for most cells. 2+ hours of 5W goodness is a possiblity here [img]images/icons/smile.gif[/img] Though if its a 2D -> 6AA mod, some of us bought such holders a while back in a mass buy. I can't remember the link though, but you might want to consider those. They should fit fine as they are (haven't tested mine yet) though they lack proper end terminals for just dropping into a flashlight

    Another option would be a 3D replacement if you could get 4AA to fit in the space of 1D. Then you could have 2 6AA packs in parallel, resulting in even lower current draw per cell. Users would have to be careful about reverse charging of cells though.

  28. #28
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    Default Re: 3AA to D cell battery holder.

    (O-o)

    You'd get longer run time than a single A cell, but less run time than if you used a full capacity D cell of the same chemistry.

  29. #29
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    Default Re: 3AA to D cell battery holder.

    Does it fit mags or not?if it fits , i could get some!!!!

  30. #30
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    Default Re: 3AA to D cell battery holder.

    Originally posted by Brock:
    Ya, I think I am the only crazy one wanting this in a parallel config (going in corner and staring at floor). Actually I have managed to get 4 8AA holders in the same space as the 8 D were, works great. But the other two lights have to be D cell sized holders so I am stuck using the AA to D adapters.

    Someday someone will make them, and I will be there to buy all 16 of them [img]images/icons/smile.gif[/img]
    <font size="2" face="Verdana, Arial">You're not the only one. I want parallel holders for high-capacity usage.

    a) There are more "miniaturized" step-up DC/DC converters. (Well, there's one, the BadBoy) than there are "miniaturized" DC/DC stepdowns - The closest is georges80's step-down regulator and it's much larger than the BB.

    b) The more cells you have in series, the more important cell matching becomes in rechargeable configurations. A 3AA parallel config could be stuck in a charger that supported D-cell batteries, a 3AA series config would have to be disassembled unless a custom charger were built. Even with disassembling the holder for recharging, I would much rather have a 2 series 3 parallel configuration at discharge time than 6 series - The chances of a cell reversal occuring are much lower. (The pack would drop to half its voltage, low enough to notice that the pack was going low well in advance of reversal. With a 6 series config, one cell could reverse easily with much less effect on the battery voltage percentage-wise.)

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