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Thread: DIY A123 Super lightweight battery

  1. #1
    lets go racing chugs's Avatar
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    Default DIY A123 Super lightweight battery

    Finally got around to making these batteries. Bought 12 lifepo4 a123 batteries on ebay shipped from China. As well as deans battery bars. Bought some heat shrink from batteryspace.com. Everything else I bought locally, wires, solder, soldering iron. I have little to no experience soldering so it looks like *****, but it works. I just watched some youtube vids on how to solder the batteries and it helped out. I got a lot of info from another member from customfighters.com. Other than that google searched a123 battery and found the info I needed. Fairly simple, wire the batteries in series. Charged the a123 battery pack on my lifepo4 trickle charger. After the batteries get charged, connected the ring terminals to bike terminals with my existing bolt and square nut from the old battery. My old battery was about 6 lbs. The new battery weighs approximately 10-12 oz.

    Parts/tools list:

    12-lifepo4 batteries, $94 (ebay)
    100-deans battery bars, $23 (ebay)
    1-soldering iron, $40 (radioshack)
    2-solder, $10 (radioshack)
    2-black&red wires, $14 (radioshack)
    1 pk-ring terminals, $5 (radioshack)
    6-(4"x1') heat shrink, $12 (batteryspace.com)
    1-lifepo4 trickle charger, $24 (ebay)



    References:

    http://www.customfighters.com/forums...ad.php?t=32323

    Last edited by chugs; Oct 1st, 2010 at 12:55 AM.
    Ride safe and Have a nice day!

  2. #2
    lets go racing chugs's Avatar
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    Default Re: DIY A123 Super light weight battery

    More pics.
    Ride safe and Have a nice day!

  3. #3
    lets go racing chugs's Avatar
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    Default Re: DIY A123 Super light weight battery

    Pics in bike.
    Ride safe and Have a nice day!

  4. #4
    Im with street fanatics!! SF Boyz's Avatar
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    Default Re: DIY A123 Super lightweight battery

    lol dang bro looks cool but if you needed a expert solder all you had to do is ask...hahhaha thats what we call bird chit. I remember my very first proud weld and my coworkers just laughed at me, now I laugh at them...(all in good nature )... sooooo so far do you think it was worth it ? give us feedback buddy...
    what do I do..build/repair/engine swap/sell aftermarket and factory parts/used parts/make custom decals/screen printing/ banners/business cards/promo pinback,magnets,mirrors buttons for all occasions/embroidery coming soon Insurance work welcome...

  5. #5
    Senior Member mk2mike's Avatar
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    Default Re: DIY A123 Super lightweight battery

    never buy things at radio shack, f'in rip off...

  6. #6
    lets go racing chugs's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Quote Originally Posted by SF Boyz View Post
    lol dang bro looks cool but if you needed a expert solder all you had to do is ask...hahhaha thats what we call bird chit. I remember my very first proud weld and my coworkers just laughed at me, now I laugh at them...(all in good nature )... sooooo so far do you think it was worth it ? give us feedback buddy...
    I think it's worth it. The lithium battery seems to work a lot better starting the bike. Cranks faster and starts up smooth. I'll keep you posted a year from now. For the three battery packs I spent about $74 each. Last time I bought a replacement battery for my bike it was about $60 and weighed 6 lbs.
    Ride safe and Have a nice day!

  7. #7
    Ride Red sincalirider's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Very nice DIY. Just an FYI for the lazy folk out there, there is also this;


    http://www.motydesign.com/

  8. #8
    lets go racing chugs's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Quote Originally Posted by sincalirider View Post
    Very nice DIY. Just an FYI for the lazy folk out there, there is also this;


    http://www.motydesign.com/
    There are a few similar batteries like motydesigns in the market. This is just an a cheaper alternative.
    Ride safe and Have a nice day!

  9. #9
    I'm big time! Agustin's Avatar
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    Default Re: DIY A123 Super lightweight battery

    This is cool stuff man. Right up my alley.
    Assume the sportbike position!

  10. #10
    lets go racing chugs's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Quote Originally Posted by Agustin View Post
    This is cool stuff man. Right up my alley.
    For sure, one of the best parts I've bought/made for my bike.
    Ride safe and Have a nice day!

  11. #11
    Yo sólo sé que no sé nada mrlopez's Avatar
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    Default Re: DIY A123 Super lightweight battery

    That's cool it would probably work really good in my WR but a bit pricey will see
    I believe that everything happens for a reason. People change so that you learn to let go, things go wrong so that you appreciate them when they're right, and sometimes good things fall apart so better things can fall together.

  12. #12
    Senior Member BlackbirdRider's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Will this last as long as a regular battery? whats expected life out of it?

  13. #13
    lets go racing chugs's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Quote Originally Posted by mrlopez View Post
    That's cool it would probably work really good in my WR but a bit pricey will see
    It can be assembled with cheaper batteries, u can use lifepo as an alternative to the lifepo4. The lifepo4 seems to be a better battery so I went that route.

    Quote Originally Posted by BlackbirdRider View Post
    Will this last as long as a regular battery? whats expected life out of it?
    I wouldn't know, but mine is still working good. I haven't had any issues with it since I installed it in May.
    Ride safe and Have a nice day!

  14. #14
    Member DEVILDOGG's Avatar
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    Default Re: DIY A123 Super lightweight battery

    so how long did your battery last?!
    With out INTEGRITY you have nothing!!

  15. #15
    lets go racing chugs's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Quote Originally Posted by DEVILDOGG View Post
    so how long did your battery last?!
    Had some issues with my poor soldering application but fixed the issue and the battery still works.
    Ride safe and Have a nice day!

  16. #16
    Dualsport Whore montibank's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Aaaaand? Still working today?

    My 500lb dirtbike could use a diet too.
    Central California Dualsport Enthusiast
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  17. #17
    Dualsport Whore montibank's Avatar
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    Default Re: DIY A123 Super lightweight battery

    As a side note that thing has to git hotter'n hell under hard cranking.
    Central California Dualsport Enthusiast
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  18. #18
    lets go racing chugs's Avatar
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    Default Re: DIY A123 Super lightweight battery

    Quote Originally Posted by montibank View Post
    Aaaaand? Still working today?

    My 500lb dirtbike could use a diet too.
    Quote Originally Posted by montibank View Post
    As a side note that thing has to git hotter'n hell under hard cranking.
    My first one I made blew up (not literally), had it on the trickle charger too long. Made a 2nd one and haven't had any issues with it, and yes it does get hot during cranks. It's got a ton of cranking amps though!
    Ride safe and Have a nice day!

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