Is the SONY VTC5 18650 batteries good for the SMOK Alien 220w?

Discussion in 'APV and Mods Discussion' started by Jumberlack, Nov 20, 2016.

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  1. Jumberlack

    Jumberlack Full Member

    Feb 5, 2016
    looking to get this mod but im not sure what batteries to get. it says they have 20A continuous discharge.
     
  2. Joergl100

    Joergl100 Senior Member

    VTC5A is the best you can get for that...but 220 watts is an illusion.
     
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  3. Jumberlack

    Jumberlack Full Member

    Feb 5, 2016
    i can't find the VTC5A on the website im ordering from...what about the purple efest 35A? better or worse than the VTC5?
     
  4. mongo74

    mongo74 It's just a flesh wound! Verified Member

    Supporting member
    Nov 15, 2016
    Ωhmsville
    Depends on how high you'll be vaping.

    Watts+10%(for device inefficiency)/cutoff voltage for mod (usually 3.2v)=amps. In series mods (like most variable wattage ones out there) you mulitply the cutoff voltage by the number of batteries.

    eg: say you want to vape your Alien at 100w: 100+10% for inefficiency (110w)/3.2v*2batteries=6.4v so 110/6.4=roughly 18.2a.

    The VTC5 is a 20a cell, so you'll reach it's constant current limit at 128w. if you don't plant on going over 110w, you should be just fine with them.

    I'm sure someone with more knowledge can explain further in detail.
     
  5. Jumberlack

    Jumberlack Full Member

    Feb 5, 2016
    i don't think ill be going above 110w very soon, but what's the danger if i do go above that? risk of explosion or just damaged mod/battery?
     
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  6. mongo74

    mongo74 It's just a flesh wound! Verified Member

    Supporting member
    Nov 15, 2016
    Ωhmsville
    It won't explode. I've gone higher than the constant current rating on batteries, in a regulated device you're safe, though you run the risk of shortening the batteries' life and possibly? damaging them. The alien has a few overheating/overcurrent/overdischarge safeties built into it. As long as you aren't vaping 200w for 10sec straight lol, you're ok. Mechanical mods without the safety circuits pose a far greater risk.
     
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  7. Eskie

    Eskie Vaping Master Verified Member

    May 6, 2016
    NY
    Pass on the Efest batteries. Get any of these 20A or higher (not really necessary) and you'll be fine.
    Battery Chart.jpeg

    Mooch is a well respected battery expert, and his ratings are spot on.
     
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  8. 6steelstrings

    6steelstrings Senior Member Verified Member ECF Veteran

    Apr 14, 2014
    North Carolina Triad
    I got my VTC5As from IMRBatteries.com. They work fine in my Smok Alien.
     
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  9. Cheallaigh

    Cheallaigh Ultra Member

    Aug 13, 2016
    Georgian Bay, Ontario
    please don't blow yourself up with the rewrapped efests... they are NOT 30A nevermind 35A...
     
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  10. mongo74

    mongo74 It's just a flesh wound! Verified Member

    Supporting member
    Nov 15, 2016
    Ωhmsville
    That img should be stickied in the new members section.
     
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  11. Jumberlack

    Jumberlack Full Member

    Feb 5, 2016
    thanks guys, i went with the Sony VTC5. i think it should suit my needs. i shouldnt have to go above 120w for a while, but im hoping i don't damage anything by doing so in the future...
     
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  12. Cheallaigh

    Cheallaigh Ultra Member

    Aug 13, 2016
    Georgian Bay, Ontario
    you did the smart thing, you asked!
     
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  13. Joergl100

    Joergl100 Senior Member

    Sure you can go above 120 Watts with 2xVTC5, there will nothing happen at all. As I wrote in another thread: Vaping does not mean continuous discharging...it means short time load.
     
  14. Cheallaigh

    Cheallaigh Ultra Member

    Aug 13, 2016
    Georgian Bay, Ontario
    and if one battery fails... yeah not so happy camper vaping... most of us would rather vape safely with as high amp batteries as we can, and hopefully as high mah as we can. we also view mooch's testing as the best safeties we have, since even stores will list batteries wrong, never mind the actual manufacturers.
     
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  15. Joergl100

    Joergl100 Senior Member

    Too much Murphy for me...[​IMG]
     
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  16. Cheallaigh

    Cheallaigh Ultra Member

    Aug 13, 2016
    Georgian Bay, Ontario
    what can I say/ I'm half irish and that ....... loves me...(edit: son of an unwed mother) and his twin bro Sullivan hehehehe
     
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  17. Hamhawk

    Hamhawk Full Member

    Oct 21, 2016
    San Carlos, CA


    This is a wonderful talk about batteries with Mooch and the Vaping Biker. I would feel 100% comfortable running VCT5As at 220w on the Alien, wouldn't get the best battery life, but it would be quite safe, even the VCT5s would be ok. In general, for battery life, I try to keep my pulse amps under the continuous discharge rating when possible.
     
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  18. KenD

    KenD Vaping Master ECF Veteran

    Aug 20, 2013
    Stockholm, Sweden
    That would be almost 40 amps on a battery Mooch rates at 25 amps, and gives a max vaping amp rating of 30. Not the best of ideas.

    Sent from my M7_PLUS using Tapatalk
     
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  19. Hamhawk

    Hamhawk Full Member

    Oct 21, 2016
    San Carlos, CA
    Except that when combining batteries you get a cumulative effect. That means you can easily put a 40amp load on a set of 25amp batteries and have a 10amp safety margin. Of course, that only really matters if you are going to hold the fire button for hours at a time. The Sony VCT5As can safely be pulsed well above their continuous rating. Take a look at Mooch's pulse charts.
     
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  20. KenD

    KenD Vaping Master ECF Veteran

    Aug 20, 2013
    Stockholm, Sweden
    That's 40 amps per battery, not 40 amps total. And that's assuming that the current distribution is identical. Almost 15 amps over the cdr, with two batteries heating up together, in an enclosed space. It's no skin of my back if people choose to exceed the cdr, even to such an extreme extent, but I had really hoped that this "its pulsed discharge so it's perfectly safe"-rubbish was a thing of the past. There is no safety margin, and you have no info on "safe pulse lengths" or how long of a pause you need between pulses. Not to mention that the cdr of batteries decreases as batteries age.

    Sent from my M7_PLUS using Tapatalk
     

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