Coke bottles as 18650 battery holders- Mtbr.com
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  1. #1
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    Coke bottles as 18650 battery holders

    I was trying to think of a good way to build up my own battery packs from 18650 cells and I remembered I had a bunch of these plastic soda bottle parisons (a parison is a bottle before it has been blow-moulded into its final shape & size). They make very versatile little containers for all sorts of uses.
    <table style="width:auto;"><tr><td><a href="https://picasaweb.google.com/lh/photo/SfsgQmxiZNeooEtZ3dVYNg?feat=embedwebsite"><img src="https://lh5.ggpht.com/_F6ejuoULyLI/Sl7oel7kc9I/AAAAAAAAONM/aVfMx_LK2Qc/s400/DSC04409.JPG" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="https://picasaweb.google.com/bradjackson78/DIYLightsHostedImages?feat=embedwebsite">DIY Lights - hosted images</a></td></tr></table>
    So I hauled them out of my garage and checked their dimensions - a near-perfect fit for 2 x 18650 cells. The cells slide in freely with about 1mm of play on the side (this us just enough to feed a cable up from the bottom . There is about 10mm at the top once the lid is screwed on, so it would leave some space for soldering connections on or whatever.

    So now I have been playing with various options, trying to come up with a good way to put these things to use. These are some of my ideas - some of them are a bit way out and maybe not so practical, but hey, DIY light building is all about creativity right??

    In their basic form, they make a solid watertight container for 2 x 18650 cells.

    I thought the threaded top may come in handy for some sort of quick-changeable screw on battery. Would have to work out how to build the terminal contacts.

    How about a funky see-through handle to extend a single-cell 18650 flashlight to accommodate 2 cells?

    Connect 2 of them together at their threaded ends to make a long 4 cell battery?? Not sure where you would mount such a long battery though.

    Here is one which I turned into a 2S battery with a cable running up from the bottom and coming out near the top:
    <table style="width:auto;"><tr><td><a href="https://picasaweb.google.com/lh/photo/uAdohP4jJl-SAzd9ciFqOg?feat=embedwebsite"><img src="https://lh5.ggpht.com/_F6ejuoULyLI/Sl7k-LRCqvI/AAAAAAAAOL0/3UWrFBubI_c/s400/DSC04410.JPG" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="https://picasaweb.google.com/bradjackson78/DIYLightsHostedImages?feat=embedwebsite">DIY Lights - hosted images</a></td></tr></table>
    <table style="width:auto;"><tr><td><a href="https://picasaweb.google.com/lh/photo/HwkT0HFAAOTDTimk8mj1nw?feat=embedwebsite"><img src="https://lh4.ggpht.com/_F6ejuoULyLI/Sl7k-ESNk1I/AAAAAAAAOL4/k4lBaKrqQLQ/s400/DSC04411.JPG" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="https://picasaweb.google.com/bradjackson78/DIYLightsHostedImages?feat=embedwebsite">DIY Lights - hosted images</a></td></tr></table>
    <table style="width:auto;"><tr><td><a href="https://picasaweb.google.com/lh/photo/MDHmPqATmcs-DMnmAf1J1Q?feat=embedwebsite"><img src="https://lh6.ggpht.com/_F6ejuoULyLI/Sl7mN6jYf8I/AAAAAAAAOMY/rSFFVpx3QHg/s400/DSC04417.JPG" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="https://picasaweb.google.com/bradjackson78/DIYLightsHostedImages?feat=embedwebsite">DIY Lights - hosted images</a></td></tr></table>
    I melted a tiny hole near the top with my soldering iron for the cable to pass through, it will be easy to just epoxy this hole closed afterwards to keep it waterproof.

    So anyone have any more bright ideas for making use of these things?
    <table style="width:auto;"><tr><td><a href="https://picasaweb.google.com/lh/photo/FxXISdVwfPz7UyyTeK263w?feat=embedwebsite"><img src="https://lh3.ggpht.com/_F6ejuoULyLI/Sl7mMzOFlDI/AAAAAAAAOMU/nThN3U1M-Xs/s400/DSC04418.JPG" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="https://picasaweb.google.com/bradjackson78/DIYLightsHostedImages?feat=embedwebsite">DIY Lights - hosted images</a></td></tr></table>
    Last edited by bradjackson; 07-16-2009 at 04:16 AM.

  2. #2
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    could you use the holder from a bike pump to hold this on your frame? the ones that go under your bottle cage

  3. #3
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    Great suggestion, I will measure it and check if the dimensions match.

  4. #4
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    Those look pretty nice for holding 18650s. Where could I buy some?

    Mark

  5. #5
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    I don't know if you can actually buy them in small quantities. My wife works for "a large soft drink company" and is able to get hold of them in small quantities. I could send you a few, but would have to check what the shipping costs would be from South Africa.

  6. #6
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    Sorry, my posts keep landing up as a reply to the original post, instead of following on at the end of the thread, not sure what I am doing wrong. Let's see if this one lands up in the right place.

    See my response to myself at the beginning of the thread.

  7. #7
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    Brew Your Own

    Quote Originally Posted by [email protected]
    Those look pretty nice for holding 18650s. Where could I buy some?
    They're used by White Labs for holding liquid yeast.



    Check with someone who home brews and they'll probably have a few laying around.
    Slow-core. -.. .-. .. -. -.- .... --- -- . -... .-. . .--

  8. #8
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    Quote Originally Posted by bradjackson
    Sorry, my posts keep landing up as a reply to the original post, instead of following on at the end of the thread, not sure what I am doing wrong. Let's see if this one lands up in the right place.

    See my response to myself at the beginning of the thread.

    Howzit

    Click 'Display Mode' at the top right of the window. Then select Linear. That will display the threads in time and date order.

  9. #9
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    This looks to be the same thing I think: http://www.countycomm.com/tubevault.htm

  10. #10
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    Yes thats it, and they are readily available to order. Great.
    So lets see how we can put these things to good use for our light setups.

    Would it be possible to cut a matching thread into an aluminium light housing to make a screw on battery?

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