Cycles on 18650?, Premature failure

Discussion in 'Battery Junkies / Chargers' started by GorGon27, Nov 14, 2017.

  1. GorGon27

    GorGon27 Silver Contributor Member For 1 Year

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    About 6 weeks ago I asked 4 Xtar and 2 Pila had failed? All going into protection. Better, first would be look at batteries. 6 chargers fail at once?

    LG.HG2. now they are not holding a charge. Escribe says getting 1000mah at 2.9v.
    There are about 140 cycles on these. Good thing I count.

    I got an entire case of bad cells! They do not seem fake or darn good. Other weird thing is sometimes they run until shutoff and come out at over 4v. These are gone. Are there bad lot's or just really good fakes?

    I apologize if this seems stupid. However a good 18650 should last at least twice this long. Issue is internal resistance is too high. Put dummy load with Multimeter. Of course by now I am a very advanced vaper but I did not know if there were 1:1 fakes or just bad lots? I do not mess around with this. Went to recycle.

    Thanks
     
  2. HondaDavidson

    HondaDavidson Gold Contributor Member For 2 Years

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    A properly charged 18650 battery will be 4.2 volt at full charge. and should be recharged BEFORE YOU GET TO 3 VOLTS. 3.7 IS nominal VOLTAGE. Is basically 1/2 way between full charge and dead.
     
  3. GorGon27

    GorGon27 Silver Contributor Member For 1 Year

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    No, it was cycles. Those batteries were gone. Charged/Discharged @20A over 400 times. My mistake is I thought it was about 140 cycles per above. Surprised they worked at all. Plus dangerous. Got new HG2's and absolutely fine. They were charging to 4.2V and discharging to 2.97 but the time they lasted had drastically decreased. Higher internal resistance. The chemistry changes with each use and too many uses will render them useless!
     
    HondaDavidson likes this.

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