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Bench Test Results: Blackcell Proton 20.3A 3018mAh 18650...accurately rated, a good 20A battery

Discussion in 'Batteries and Chargers' started by Mooch, Jun 27, 2018.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    These tests below only note the estimated ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, LG, Panasonic, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.

    Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of personal injury or property damage. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition.

    Testing batteries at their limits is dangerous and should never, ever, be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.

    If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.

    C486F2A4-D4FE-4805-9B22-F0875455E560.jpeg 11BC0A0F-689D-4617-9674-F5749B31C785.jpeg 53E3F9A5-F126-449B-BFC9-78B9D27A6E7D.jpeg B4F8872A-CBB8-4831-A7EC-9B4C97A011AF.jpeg

    Bottom Line
    While this cell has a useless 40.2A “Max” current rating on the wrap it has accurate continuous current and capacity ratings and is a great choice for regulated mods. It is essentially equal in performance to the Samsung 30Q and LG HG2. The VTC6 still performs slightly better than this Blackcell though.

    Blackcell’s are not widely available in the US and EU but are very popular in Asia. These cells can be a good option since genuine Samsung, LG, and Sony cells are hard to find there.

    I hate seeing the use of a “Max” current rating on the wrap, particularly when placed above the continuous discharge rating (CDR), but at least the CDR and capacity ratings are accurate. I hope Blackcell removes this “Max” rating soon.

    The two cells I tested delivered 3119mAh and 3109mAh at 0.5A down to 2.5V. This is consistent with a cell rated 3000mAh minimum.

    I’m often asked about ratings like these but I have no idea why they used “20.3A” and “3018mAh” as cell to cell variations make that kind of rating unnecessary and confusing. It is very easy to misread these numbers, especially when they are made so small. Hohm Tech also does this and I think it just takes away from the simplicity and clarity we need when placing ratings on the cells we buy.

    I am estimating this Blackcell’s ratings at 20A and 3000mAh.

    Three cells were donated for the purposes of testing by Blackcell (BLACKCELL). Thank you!

    Continuous Current Discharge Graphs
    6023F2A3-3242-48BD-8BF8-8238162539CF.jpeg 3D78CF00-3801-4AE3-B740-8C77BB00A7BA.jpeg

    Ratings Graphic

    Performance Specs
    - DC Internal Resistance = 18.9mOhms (milliohms) average for the two cells.
    - Total energy delivered down to 3.2V at 10A continuous = 7.1Wh (Watt-hours) average
    - Total energy delivered down to 3.2V at 20A continuous = 5.5Wh (Watt-hours) average

    I want to work for the vaping community full time! If you feel what I do is worth a couple dollars a month and you would like early access to battery availability and testing news and a say in what I test then please consider becoming a patron and supporting my testing efforts: Battery Mooch is creating battery tests and educating vapers | Patreon.

    Blackcell paid a fee to be moved to the front of the testing queue, which currently has a 10-12 week backlog. This cannot influence my test results as they pay in advance, have no say about what is in this report, and I don’t care if any company never does this or donates batteries again. My reputation is a lot more important than any battery donation or payment.

    To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
    • Like Like x 5
  2. mimöschen

    mimöschen Super Member ECF Veteran

    Jul 15, 2016
    Is this a rewrap or a cell manufactured in china?
  3. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    My guess is that it’s a China cell as it doesn’t match any Samsung, Sony, LG, etc., cell I have.
    • Informative Informative x 1
  4. mimöschen

    mimöschen Super Member ECF Veteran

    Jul 15, 2016
    Interesting. It looks like China's massive support of and investment in the electric car market finally pays off.
    If they continue to improve at that rate, the next couple of years will be very interesting.
  5. Rossum

    Rossum Surly Curmudgeon Verified Member ECF Veteran

    Supporting member
    Dec 14, 2013
    SE PA
    Does any manufacturer of electric vehicles other than Tesla use cylindrical cells?
  6. Robin Becker

    Robin Becker Senior Member

    Feb 3, 2018
    Yes and No. Many of the automative batteries are prismatic batteries (look like a pouch), where lots of cylindical cells are connected in parallel.
  7. Rossum

    Rossum Surly Curmudgeon Verified Member ECF Veteran

    Supporting member
    Dec 14, 2013
    SE PA
    Where do you get the idea that prismatic cells are composed of cylindrical cells wired in parallel?

  8. Robin Becker

    Robin Becker Senior Member

    Feb 3, 2018
    It is not the prismatic cells we know, they are just look like the prismatic cells, so I didn´t know how to describe it...

    Sealed Energy.JPG
    They are also called sealed Energy systems. There are inside the case connected in parallel cyclindrical cells.
    The manufacturer that presented this battery sue it as LiFePo4 for electric buses in China.

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