Flat Top Battery Polarity

Discussion in 'Battery Issues' started by Amirite, Feb 16, 2013.

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  1. Amirite

    Amirite Super Member Verified Member

    Supporting member
    Which end of the flat top battery is positive? I have the Trustfire TR-001 and I'm not sure if this charger is just not capable of charging this type of battery (Samsung ICR18650 - 26FU) or if I caused some damage by reversing polarity.
     
  2. Jacoji

    Jacoji Ultra Member Verified Member

    Apologies - it looks like I directed you to a ghost town over here.

    I can answer the first part of you question. The battery will have some sort of marker as to positive and negative and the ends will look different. The + will look like a smashed button and the bottom have a truly flat surface.

    My 14650 battery:
    [​IMG]

    [​IMG]
     
  3. Amirite

    Amirite Super Member Verified Member

    Supporting member
    Okay, So I didn't reverse the polarity. I guess the Trustfire TR-001 dual bay is not capable of charging flat top batteries.

    Thanks for clearing that up.
     
  4. mostlyclassics

    mostlyclassics Ultra Member Verified Member

    Supporting member
    My Trustfire TR-001 has no problem with flat top 18650 batteries. It shouldn't have any problem charging your Samsungs.
     
  5. Jacoji

    Jacoji Ultra Member Verified Member

    Troubleshooting:
    • Was this a new battery or had it been used and in need of a charge?
    • Do you have a multi-meter or check battery function on any of your mods to read the current charge level?
    • Does it make any difference to give the battery a half-turn spin once inserted in the charger? You'd still have to wait for the full charge indicator on your charger to know if this makes a difference.
     
  6. Amirite

    Amirite Super Member Verified Member

    Supporting member
    It worked this time! Must have inserted poorly on my previous attempt.
     
  7. WillyB

    WillyB Vaping Master

    They do have a bit of a problem sometimes due to the almost flush positive terminal on the charger. Most newer chargers have a more prominent, protruding terminal.
     
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