Battery box with USB connector- Mtbr.com
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  1. #1

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    Battery box with USB connector

    I thought this looked interesting:



    It is a 4xAA battery box with a USB connector. It claims to put out 5V but 4 AAs add up to 6V, so not sure about what is inside the little bit near the USB connector.

    So three possibilities, as I see it

    1. Strip out any intervening electronics and pop in the driver of choice and you have a nice little battery box with the driver well protected.

    2. There are some DC-DC converter electronics in there that could be subverted for our evil LED purposes.

    3. Strip out everything but still use the USB connector to run a USB cable to your light head (least interesting of the options).

    If Jaycar in Aus have these boxes then they are bound to be available elsewhere.

    EDIT: DX have something a little similar, but definitely no DC-DC converter:

    Last edited by glowinthedark; 03-10-2009 at 06:45 PM.

  2. #2
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    I think USB is rated for fairly low current - like 300mA max or something. I can't remember where I saw the specification...

  3. #3

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    According to wikipedia the maximum current (for a USB 2.0 port). is 0.5A.

  4. #4
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    Okay, that's not so bad then. What are you planning to illuminate?

  5. #5

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    Quote Originally Posted by pinkrobe
    Okay, that's not so bad then. What are you planning to illuminate?
    It gets better -- there are four smaller cables in a USB cable, so you could double up (should, as the cables are fairly thin) using two for +ve and two for -ve. This should allow for higher currents.

    My use for them would be power packs for commuter lights, i.e. a single Q5/R2 emitter.

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