old maglites ?

Discussion in 'Lounge' started by shadowlands, Feb 15, 2016.

  1. I'm not tying to get advice on better brands.
    I'm not tying to obtain a tiny AA or AAA cree flashlight with hundreds of lumens.
    I'm just curious about the following, and wondering if anyone knew.

    I have an older 6D Maglite with a Nite Ize 74 lumen LED bulb.
    I also have an older 4C Maglite with a Nite Ize 55 lumen LED bulb.
    Both are running Nimh rechargeable cells.
    What type of "run time" "battery life" can I expect?
    What would you think either may be capable of?

     
  2. Dane

    Dane Supporting Member

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    Lot of unknowns still. Age and capacity of the cells? Best I would say is someone could only guess.
     

  3. planosteve

    planosteve Lifetime Supporter

    For a rough estimate find the current draw of the bulb should be listed in mAH. Then add up the mA of your battery. Devide your battery power by the draw and that should give you rough estimate of the life.
     
  4. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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    NiMH is one of the "special chemistry" batteries that can be charged
    via the HV Pulse DC method. I have built these, but not automated.
    They are also available from Tesla Charge and Renaissance Charge
    companies. John Bedini is the inventor and they are fantastic. I
    have experienced steadily increasing battery capabilities when using
    this charge method, and it can also charge alkaline batteries :D
    but Duracell started downgrading the seals around 7-8 years ago and
    now the alkalines leak if charged :( :mad:
    NiMH is a great battery, and can likely have an almost unlimited
    service life if properly maintained. Milli-amp hours can also go
    UP with repeated charging using this type of charger, as well as
    nominal "full voltage" readings. This type charger works best on
    NiCad, NiMH, and Lead Acid, and the older style Alkaline cells. :)
     
  5. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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    It looks like it is definitely worth doing, if you are asking that.
    I read some reviews online and almost ALL list longer run times.
    These are not terribly bright LEDs, so I would imagine run time is
    good compared to some of the brighter sets.

    The chargers I listed above are very expensive, but work for
    everything I listed. Li-Ion cells are not compatible, unless the
    newer units have the capacitors arranged to make it work with
    Li-Ion batteries. The Lithium chemistry overheats with the
    HV Pulse DC charger style ;)
     
  6. planosteve

    planosteve Lifetime Supporter

    The last thing you want to do is overheat a lithium battery, the like to burn.
     
  7. I use six Nimh rechargeable D batteries in my 6D Maglite. It contains the Nite Ize 74 lumen bulb. Even with that set up, the beam has a very long reach. I'm impressed. And my 4C Maglite is running on 4 Nimh batteries as well, but with a Nite Ize 55 lumen bulb.
    I may charge them and leave them on one weekend and see how long it takes to drain them.
     
  8. Finally! Here's the information that I've been looking for.
    Nite Ize emailed me back...

    The average runtime for the 55 lumen LED Upgrade using a 3 cell flashlight is 81 hours, and using a 6 cell flashlight, the runtime is approximately 105 hours.

    The average runtime for the 74 lumen LED Upgrade using a 3 cell flashlight is 45 hours, and using a 6 cell flashlight, the runtime is approximately 55 hours.
     
  9. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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    I got like 8 NiMH from Radio Shack on a close out several years ago,
    still kinda high :D Big ba$tard$ and they are highly rated, maH...
     
  10. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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    You need to ask what their "duty cycle" is, or discharge rate.
    There must be a pwm circuit in the LED module, because of the
    wide range in cell counts. Maybe... :confused:
    Maybe not, as I would expect the run times to double with
    a double voltage input and a pwm running the LED.

    PWM is a Pulse-Width Modulator circuit, it takes a given DC
    input, pulses the output of an SCR or mosfet and accumulates
    the charges in a capacitor, which then feeds the load, in this
    case an LED. You get the MOST out of your batteries that way,
    it can run them lots lower than the LED can. LEDs cut off at around
    1.0 volts (give or take) and then just shut off. The PWM will keep
    working down to around .2v iirc and bump up the output to LED
    voltage requirement levels until the cells are DEAD. D-E-A-D !!!
     
  11. lklawson

    lklawson Staff Member

    So if you use it only at night, it has a > 8 night run time. :)

    Peace favor your sword,
    Kirk
     
  12. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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    If you can determine the mah ratings of the batteries
    (printed on the side, most likely) we can look up the
    discharge rates for max life and output on a charge.
    c20 is considered optimum for an L.A.B. but NiMH is
    better, you can expect a better duty cycle...
     
  13. missiledefender

    missiledefender Supporting Member

    I like the LED Bulbs in the new Maglite's, check them out. Nice and bright and don't eat up batteries AND still crack a skull. Bright light, makes you see stars.
     
  14. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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  15. lklawson

    lklawson Staff Member

    Because oil may not last forever and they want the company to keep making money? They don't think of themselves as an "oil company" but, instead, think of themselves as an "energy and energy innovation company?"

    Peace favor your sword,
    Kirk
     
  16. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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    I love your naive child-like faith in big business:sarcasm: I could go with that
    except for Chevron's subsequent actions, regarding that particular battery
    technology... They refuse to license it for anything larger than hand held
    power tools! :mad: Ford had an early prototype Ranger Truck with a
    big NiMH Battery behind the bench seat, it was better than the current
    Li-Ion arrangements in range, size and power... in the early 90's! :eek:
    NiMH is heavier than Lithium, but has (or had) a better power density
    also. Research and Development has stalled out since Chevron gobbled
    up the patents and rights in the mid 90's. Seems it was simply to put
    off development of electric vehicles.

    Honda used a big battery of single cell NiMH units, it was an off-the-shelf
    "D Cell" NiMH and they used 84 of them, in the Insight. The car was not
    bad for a hybrid! I talked to a former owner of one and he said it would
    really scoot in gas/electric mode, and got really good MPG. Over 20 years
    ago. Basically matching the current Prius in performance (speed, etc)
    and besting it in economy... but it was a 2 seater. :cool:
     
  17. lklawson

    lklawson Staff Member

    IF that :conspiracy: is true, then they're really going to be screwed when carbon nanotube batteries hit the market.

    ...or when the patent expires two years ago.

    Peace favor your sword,
    Kirk
     
    Last edited: Feb 17, 2016
  18. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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    But they stunted the development of Electric Cars for an additional 25 years or more! $,$$$,$$$,$$$,$$$.¢¢ !
    Think about That!
     
  19. undeRGRound

    undeRGRound ROLL wif Da MOLE! Supporting Member

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    I think the Li-ION tech has surpassed the NiMH for the most part,
    and TESLA is going all in with the Giga-Factory (or w/e they call it)
    so no need to cover the NiMH any more with patent protections...
     
  20. desertrider

    desertrider Member

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    Good info to have, thanks for sharing.

    I was a big supporter of Mag lights starting in the '80's all the way through about '08 when the internet made smaller and brighter LED lights affordable.

    Lately I've been wanting to resurrect my Mag lights from their garage loft burial site and upgrade them with some LED bulbs. I had a Nite Ize upgrade bulb in one of my 2 cell AA lights, wouldn't mind upgrading my D cell lights as well.