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Thread: Solution for those 2R10 "Duplex" powered lights

  1. #1
    Join Date
    Jan 2009
    The Netherlands, Amstelveen

    Default Solution for those 2R10 "Duplex" powered lights

    I still kept them: those old, handy sized 2R10 battery-needing flashlights... batteries for these are hard to find, in Europe only Conrad still seems to sell them.
    These Zinc-carbon batteries have very limited capacity, and are depleted before you know it...

    But I found THE solution!! Dig them up, those lights, because you are going to use them again! All you need is a Keeppower protected 21700 with 5000mAh capacity. At least these are 75mm long, that's what we need... and don't forget to change the bulbs from 2,4V/2,5V to a 3,5V or 3,6V one!

    Old meets new can result in some splendid solutions... this is one of them. Not only finally guilt free lumens to enjoy, there are MORE lumens from the same flashlight due to the higher voltage, and think about it... 5000mAh!! Even with a "heavy" bulb that draws 500mA you will have TEN HOURS runtime! And all that in such a tiny package! Too good to be true? No... in this case, it simply IS true :-)

    A pity I cannot attach a picture still... in Germany they just understand how to offer the ability to attach pictures... at you can attach a picture JUST as easily as on Facebook... WHEN will that finally be possible HERE?? We live in 2020... !!

  2. #2
    Join Date
    Nov 2004
    Adelaide, Australia

    Default Re: Solution for those 2R10 "Duplex" powered lights

    325addict, you have a package at the post office ready for pick up.......

  3. #3
    Flashaholic* snakebite's Avatar
    Join Date
    Mar 2001
    dayton oh

    Default Re: Solution for those 2R10 "Duplex" powered lights

    did one up for a neighbor.
    took a "duplex" battery.
    has a pr bulb so post 1935.
    put in a k3 xenon plus 900ma bulb and a lg m50 21700.
    the guy had had it 50 years and the last 40 it was a pretty paperweight.

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