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Thread: What battery?

  1. #1
    mtbr member
    Reputation: trdi's Avatar
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    What battery?

    First of all, hi to ewerybody!
    I am new to DIY bik lights, and I have opportunity to buy 3W and/or 5W LED light from my neighbour. I donīt hawe battery and I donīt know how much duration will I have with some battery. For example I found this battery on Ebay, and it seams to me like a god battery, but I dont know how long it will last with one charging?

    DC 12V Super Rechargeable Li-ion Camera Battery 6800mah

    http://global.ebay.com/DC_12V_Super_...377895224/item

    Please help me or shoot me!

  2. #2
    aka RossC
    Reputation: ocean breathes salty's Avatar
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    Quote Originally Posted by trdi
    First of all, hi to ewerybody!
    I am new to DIY bik lights, and I have opportunity to buy 3W and/or 5W LED light from my neighbour. I donīt hawe battery and I donīt know how much duration will I have with some battery. For example I found this battery on Ebay, and it seams to me like a god battery, but I dont know how long it will last with one charging?

    DC 12V Super Rechargeable Li-ion Camera Battery 6800mah

    http://global.ebay.com/DC_12V_Super_...377895224/item

    Please help me or shoot me!
    Do you have any info about the light? Is it a factory product or one that he has DIY'd? Do you know what battery it was run off? The thing that we really need to know is what voltage the battery it has been running off. If you get this wrong, you cook the whole thing. Since you linked a 12 v battery, I am assuming that is what it was running off before?

  3. #3
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    I think that so light batery can't provide so big voltage and cappacity. Be aware of such good deals

  4. #4
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    Hi!

    This are lihgt models.

    http://www.fawoo.com/light_en/produc...010&number=306

    and

    http://www.fawoo.com/light_en/produc...010&number=219

    Did any of you even heard about that firm?

    Iīam also suspicious about that batery in sense of cappacity and voltage, so I put that on forum... It is small, but it is also LiIon so maybe is that the rison of its small size?

  5. #5
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    Reputation: Jim Z in VT's Avatar
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    Yes, you need 12 volts for those lights. IF the 6800mAh spec on that battery can be trusted, it will run those lights for a good long time.

    JZ
    It's not about speed, it's about lack of control.

  6. #6
    aka RossC
    Reputation: ocean breathes salty's Avatar
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    I don't think that battery or charger has any protection circuits. So you could easily overdischarge the battery and kill it or overcharge it and start a fire.

  7. #7
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    Quote Originally Posted by ocean breathes salty
    I don't think that battery or charger has any protection circuits. So you could easily overdischarge the battery and kill it or overcharge it and start a fire.
    The fact of using a two-wire connector with series of lithium sells means that the battery HAS GOT protection circuit.

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