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Battery question

Discussion in 'General Vaping Discussion' started by Classic vaper, Apr 17, 2019 at 4:16 PM.

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  1. Classic vaper

    Classic vaper Full Member

    Jan 12, 2019
    I have been vaping with 18650s in my mechs since 2014. I see all this new hype for 20700 and 21700 hybrid mods and am thinking about getting one. Whats the benifits and differences between 20700 and 21700? Do they hit harder? Obviously they have better capacity than 18650s.
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  2. Baditude

    Baditude ECF Guru ECF Veteran

    Apr 8, 2012
    Ridgeway, Ohio
    The main differences between 18650, 20700, and 21700 batteries are physical dimensions and specifications. Larger physical dimensions means more electrolyte can be packed inside the cell to pump up the specifications (primarily the capacity or mAH, but may increase the CDR a bit). Downside with the larger batteries is the larger dimension meaning they require a larger and heavier battery device.

    Do they hit harder? I have no idea as I only deal with 18650-size batteries myself. @Mooch would be a better person to answer this question as he has done bench tests on hundreds of vape batteries.

    Mooch said this about the Samsung 21700 30T:

    "Right now this is the best performing cell available to us for higher power levels and unregulated/mech mod users. The 30T is a true 35A 3000mAh 21700 cell that hits harder than any other round battery we use. New cells are always coming out but the 30T is king right now.

    Samsung rates this cell at 35A continuous and 3000mAh."

    Click pic to enlarge to full size
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  3. robrrt

    robrrt Full Member

    What I like about a 21700 mod is that it can drive a larger tank (like a Cloud Beast) without the hassle of pairing 18650s. I started off with an iJoy Capo (crap) and an iStick Pico S, but recently splurged on an Asmodus Amighty and I love this mod. I've been using a small variety of 40a batteries; they discharge faster, but perform better than the 30T in my opinion.
    • Agree Agree x 2
  4. DaveP

    DaveP PV Master & Musician ECF Veteran

    Supporting member
    May 22, 2010
    Central GA
    As a MTL vaper I'm more concerned about vape time (MAH) than high current (Amp rating). The Samsung 40T 21700 fills the bill and gives me enough power to get through a day and into the next morning on a single cell at 10W. I can be away from home all day without worrying about carrying backups. The mod and a small bottle of refill juice is all I need.
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  5. Baditude

    Baditude ECF Guru ECF Veteran

    Apr 8, 2012
    Ridgeway, Ohio
    40 amp batteries, you say? Which ones might those be specifically?
    • Agree Agree x 2
  6. robrrt

    robrrt Full Member

    (heh, I knew I should've added that) Aspire, iJoy & Golisi
    • Funny Funny x 1
  7. Baditude

    Baditude ECF Guru ECF Veteran

    Apr 8, 2012
    Ridgeway, Ohio
    None of the batteries that you listed are actually 40 amp batteries. Battery Mooch bench tests batteries for accurate specifications, performance and safety for a living, and often finds the advertised specifications to be hugely exaggerated. I hope you haven't built your RBA's without some headroom of safety because the batteries that you have chosen are terribly over-rated.

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  8. robrrt

    robrrt Full Member

    As stated earlier, they perform well for me & {checks forum assigned} I don't build :D
    Appreciate the links regardless

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