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  1. #1
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    Best cold weather 18650ís

    What 18650 batteries have you guys had the best luck with in cold weather? Also, where do I get them? There are so many options out there and so many have crazy mAh ratings.

  2. #2
    EAT MORE GRIME
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    there really are no differences in lithium ion, cold affects them the same
    best you can do is buy top notch ones..
    panasonic/sanyo (NCR), lg, or samsung are the top players

    avoid others.

    #1 just do not charge a cold lithium, let it warm up to at least 40 deg or higher
    before slapping a charger on it, or kiss that thing goodbye if you try to charge a frozen (32 deg or lower) cell

    max mah possible is 3600mah (3545 nominal) but unless your driver
    is developed for the specific call, max mah doesn't always mean more runtime at a specific brightness. sometimes a pack of 2800mah can outrun a pack of 3400's it depends on the 'discharge curve' and some lower mah cells tend to stay higher volts in the mid-range of their runtime and some drivers respond better to that.

    drivers may see the steep initial drop of volts on a 3400 or 3600 as a sign the battery is depleting and it won't run at max brightness as long as a 2800 would, or will indicate as low battery really soon, but will stay on low battery for a long time

    anyhow, 3600 max, and cold affects them all about equal.
    "Put your seatbelt back on or get out and sit in the middle of that circle of death." - Johnny Scoot

  3. #3
    Light freak
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    Avoid E-Bay!!!!

    *****

  4. #4
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    perfect. This was what i was looking for. Is there a online retailer that has a good track record?

  5. #5
    EAT MORE GRIME
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    Quote Originally Posted by Jefflinde View Post
    perfect. This was what i was looking for. Is there a online retailer that has a good track record?
    battery junction is my go to...

    https://www.batteryjunction.com/


    all 18650 they sell have top notch guts.
    orbitronic, nitecore, klarus, olight, these are special by the brand which makes the wrapper and protection circuit, but they contain high end core cells inside.

    the olight 3600's have been rock solid for me

    the ultrafire name is usually poison anywhere, except on this site,
    as true ultrafires are fine cells. but there are so many fakes,
    usually anything with the name *fire is garbage. but not from
    here and not actual ultrafires...they are good.
    "Put your seatbelt back on or get out and sit in the middle of that circle of death." - Johnny Scoot

  6. #6
    Light freak
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    I have used BatterySpace.com with great results. Batteryjunction should be good also. I have found that batteryspace does not build their packs up in advance and have them setting on a shelf for months. Feels like they build them to order.


    ****

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