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Bench Test Results: Orbtronic 30A 3120mAh 18650...playing ratings games?

Discussion in 'Batteries and Chargers' started by Mooch, Mar 31, 2020.

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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, Murata, LG, Panasonic, Molicel, 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 physically and electrically protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition. Use of any of these batteries is AT YOUR OWN RISK.

    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.

    AA47B37C-CA77-4D3C-A3C7-9A0508F12635.jpeg 78D79BAF-BB7F-437D-B9CE-6096642728F1.jpeg FBEE6CED-9D3B-4262-9AE4-33E29DABFC50.jpeg C9C03A9B-ADF1-4425-A3EF-6C9E08FA28FA.jpeg


    Test Results
    This appears to be a rewrap of the Murata VTC6, rated at 15A continuous by Murata, but the Orbtronic cells performed a bit worse than a Murata VTC6.

    The VTC6 has a “temperature-limited” rating of 30A if you do not let it get hot, over 80°C. You can use it at up to 30A but at above about 17A-20A you could get more run time from the more efficient 25A cells like the Molicel P26A and the Sony/Murata VTC5A and VTC5D. This is because there is less voltage sag with these higher performance cells and that means the voltage stays up for longer when being used hard.

    One issue I have with this Orbtronic cell is that the wrap has a big, bold “30A“ on it and only in the tiniest lettering can you see that it‘s not a true 30A cell. You cannot use that 30A rating to compare this cell to any others that just list their true continuous current rating!

    The 40A “max pulse“ rating on the wrap is just something they made up. It’s not listed in the VTC6 datasheet and there is no standard for setting a “max pulse” rating. It cannot be used to compare these cells to any other cells.

    The VTC6 has a rated capacity of 3000mAh and a nominal (typical) capacity of 3120mAh. While the capacity rating that Orbtronic uses is the nominal rating for the VTC6 be careful when using this 3120mAh rating to compare this cell to any other one. Other cells typically use the lower rated capacity number, as they should since it is a guaranteed minimum capacity.

    The capacity of the two cells I tested was 3090mAh (below Orbtronic’s rating) and 3122mAh. Since the two cells I tested cannot be the lowest capacity Orbtronics out there I am rating them at 3000mAh, the rated capacity of the VTC6.

    I am very disappointed to see that Orbtronic seems to be playing the same ratings games as some China battery wrapping companies.

    This Orbtronic cell uses a paper top insulating ring so I recommend not allowing it to be exposed to any liquids as they could be absorbed and cause rusting under the ring. Paper rings can be more resistant to extreme heat though than plastic insulating rings.

    Two cells were purchased for the purposes of testing by me.


    Continuous Current Discharge Graphs
    27CF00EF-BED2-4B9E-8AEA-3A08A106F70E.jpeg


    Ratings Graphic
    0883280B-DA51-460D-A1E0-1512007F40FF.jpeg


    Performance Specs
    DC Internal Resistance = 20.3mOhms*** (milliohms) average for the two cells.
    Watt-hours (energy) delivered at 30W (10A) down to 3.2V = 7.7Wh
    Watt-hours (energy) delivered at 60W (20A) down to 3.2V = 5.6Wh
    2-sec puff count at 30W (10A) = 462
    2-sec puff count at 60W (20A) = 168

    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, battery and charger testing and 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.

    To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum

    ***I have switched test jigs, resulting in slightly lower IR readings versus my previous setup. Add 1.6mOhms to this IR value in order to compare these cells to others tested previously.
     
    • Informative Informative x 6
    • Like Like x 2
  2. Don29palms

    Don29palms Moved On ECF Veteran

    Sep 12, 2014
    joshua tree, ca
    Thanks mooch
     
    • Like Like x 1
    • Disagree Disagree x 1
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