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18560 battery

Discussion in 'Night Vision Optics and Illumination' started by babs2020, Jan 16, 2014.

  1. babs2020

    babs2020 Engaging Member

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    hi guys which one of these are the best to buy and were from
     
  2. terry1001

    terry1001 Major Poster

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    You've got a couple of options, firstly you can buy the cheap ultrafire type cells from ebay they aren't always perfect but you can get several for the cost of the second option which is to buy branded items from torchy the battery boy. A decent charger, such as the Nitecore i4, is worth having. There is another option you might consider and that's stripping cells out of an old laptop battery, they are usually 18650 and often contain decent cells.
    It is important with these cells that you don't overcharge them or short circuit them as they can catch fire, don't go out and leave them on charge unattended.
    The ebay ones may well claim 5000mah capacity etc but realistically they will be about half that.
     
  3. babs2020

    babs2020 Engaging Member

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    are the nitecore batterys any good
     
  4. Tripleteer

    Tripleteer Donator

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    It's 18650 battery and torchy on ebay.
     
  5. Tripleteer

    Tripleteer Donator

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    Panasonic 18650 are also a good battery, atb Paul.
     
  6. David M

    David M Donator

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    There are plenty on Ebay or Amazon mate, I bought some 'Protected' Ultrafire 14500's that are 900mAh and work my torch for around an hour a charge. 18650's are much higher capacity (2000+mAh) but a little thicker in diameter. The 'Protected' bit means if they are over charged or shorted, they shouldn't catch fire, just go open circuit, something I thought was worth the extra money....:)
     
  7. rabbitraider1

    rabbitraider1 Engaging Member

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    I would be careful with some batteries sold on ebay, there have been instances where they are recycled laptop batteries, the wrong type of battery put in a 18650 shell etc and although most will work to some degree they never last very long and you run the risk of them shorting and catching fire,
    same for the chargers.

    I did have some cheap batteries I got off ebay with a two pin charger, I've now chucked them and bought some decent ones because I don't really want to risk burning my house down for the sake of a few quid :p
     
  8. terry1001

    terry1001 Major Poster

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    I've pulled a few laptop batteries apart and they generally have contained branded cells such as Samsung, Sony and Panasonic. It is possible that some rejected laptop cells have found their way into the market, there must be some that don't make the grade although I'm not sure that Chinese quality control would actually identify dodgy batches.
    It probably makes very good sense to buy a decent charger, the cheap ones that come with a pair of cells never look very good although the quality does vary. A Nitecore i4 charger is not expensive and will handle virtually any rechargeable cell you're likely to use.
    No batteries should be overcharged either at too high a current/voltage nor should they be discharged too quickly or short circuited. Common sense is useful to help prevent problems. Don't leave them on charge while you go away for the weekend and take them off charge as soon as they're done. If you are worried that they might catch fire you can use a charging bag as used by radio control modellers who have some very big batteries.
    Misuse of these high capacity batteries can cause problems - just ask Boeing about the battery packs in their new Dreamliner.
     
  9. Alex.mc

    Alex.mc Busy Member

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    There are branded batteries on ebay, although they cost more obviously.

    No battery being charged should really be left unattended! Batteries are a dense storage of power, whatever their chemistry and capable of trouble is misused or handled. I saw a recent case of a Samsung S3 mobile phone catching fire on it's own branded charger!

    I always charge batteries when I'm around. I never nip off out and leave them. If you are cautious, you can buy flameproof bags to charge batteries inside of. The model Aircraft guys often use them as the Lithium cells they use are of very high densities.
    http://www.ebay.co.uk/itm/like/1610...ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=95&ff19=0

    At worst, you could always charge them placed inside a metal pot or container, or even just sit them on a heatproof surface. A piece of metal or a tile?
     
  10. Falcon User

    Falcon User Engaging Member

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  11. rmpc50

    rmpc50 Active Member

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    Apart from the obvious, what is the difference between flat top and button top 18650 batteries for using in torches?
     
  12. Falcon User

    Falcon User Engaging Member

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    None in theorie, but my ND30 laser designator clone has a slightly recessed endcap, and thus will not work with flattop 18650's
     
  13. terry1001

    terry1001 Major Poster

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    The flat top ones will work in torches that have a spring as the positive contact on the underside of the led driver. Some torches have just a flat surface and would need the button top type. The flat ones can be pulled from laptop batteries and they have metal strips soldered to each end of the cell connecting it to the next one in the pack. The negative end can have the strip removed, on the top (positive) you can leave a small length of the strip and bend it back on itself and form a raised connecting point.
     

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