Bench Test Results: Vapcell U30 - 30A 3000mAh 18650

Mooch

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    These tests below only note my personal opinion for the ESTIMATED ratings for the batteries I tested at the time I tested them. Any battery that is not a genuine Samsung, Sony, Murata, LG, Panasonic, Molicel, EVE, Lishen, BAK, or Sanyo can change at any time! This can be 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 property damage, personal injury, or even death. Never use them outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous discharge rating (CDR), never let it get colder than 0°C or hotter than 60°C, and keep the plastic wrap and top insulating ring in perfect condition. Never use a battery that is physically damaged in any way.

    Testing batteries at their limits is dangerous and should never 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.

    IMG_3855.jpeg IMG_3857.jpeg IMG_3858.jpeg IMG_3859.jpeg


    Test Results
    This is a great performing 18650! At 10A/30W to 30A/90W it performs the same or better than any 18650 I’ve tested, equaling the Molicel P30B at 30A…which is incredible.

    At 5A/15W the EVE 35V and Vapcell F38 are better performers. At 5A/15W it doesn’t quite match the Samsung 30Q and Murata VTC6 but it’s about the same as the LG MJ1, Molicel P28A, and Molicel P28B.

    I have not tested the cycle life of this cell and do not know if it sacrifices that for better short-term performance.

    Vapcell’s 30A continuous current rating is high since this cell reaches its max temperature spec of 75°C at about 25A. Its voltage also sags too much at 45A so I am giving it a non-continuous, temperature-limited rating of 40A. Never let it get hotter than 75°C and I strongly recommend staying under 60°C to prevent accelerated aging of the cell.

    Two cells delivered 2922mAh and 2938mAh which is great consistency but that’s under the 3000mAh rating. Since I cannot have the lowest capacity cells in the batch I am rating them at 2900mAh. This means nothing for our real world use though since it performs so well (small voltage sag). Just another example of how the capacity spec shouldn’t be used on its own to choose longer running cells.

    The DC internal resistances for the two cells were 10.8mOhm and 11.1mOhm, also very consistent. Both cells performed essentially identically.


    Continuous Current Discharge Graphs
    Vapcell U30 - 3000mAh 30A 18650 CC Tests.jpeg


    Ratings and Performance Specs Graphic
    IMG_6944.jpeg


    18650 Ratings and E-Scores Table:


    20700/21700 Ratings and E-Scores Table:

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    To see how other cells have tested check out this link: Links To All 21700, 26650, 18350, 18500 Battery Tests
     

    Mooch

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    You do a lot of work, man. And don't receive nearly enough simple thank yous.

    Well, I thank you because I ALWAYS check in with your latest data before making purchases and I have for YEARS.
    Thank you!
    I’m glad my testing has been useful to you for so long.
     

    Mooch

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    should these batteries and others weigh the same?
    If I buy 5 samsung 30Q should they all weigh the same? What if they dont?

    thanks
    Each battery model should have all of them weigh within a fraction of a gram.
    If they don’t then one or more may be a fake.

    Different model batteries can weigh a different amount.
     

    Cartel

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    Oct 30, 2013
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    Each battery model should have all of them weigh within a fraction of a gram.
    If they don’t then one or more may be a fake.

    Different model batteries can weigh a different amount.
    I guess canvape sold me some fakes
     

    Mooch

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    I guess canvape sold me some fakes
    We don’t know that. Check them.
     

    Mooch

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    well the weight is off, is that not enough? also they dont last very long. I have years old batteries here that are about the same
    It could mean they are fake but doesn’t guarantee it. Accusing a vendor of selling fakes is a huge deal, you have to be sure. If you want, send me the cells and I’ll authenticate them. I won’t be able to return them though. If fake you can contact the vendor with the info I send you.
     
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    Cartel

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    Oct 30, 2013
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    I appreciate the offer. I am changing the battery after about 3 hours with most of them.
    Real samsung 30Q would last me someimes a whole day.
    I vape with 6 watts. Ifind when the battery gets to 3.8v there is not enough current to vape so I throw it in the charger

    would something like this be good enough to benchmark them?

    2024006.jpg
     
    Last edited:

    Mooch

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  • May 13, 2015
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    I appreciate the offer. I am changing the battery after about 3 hours with most of them.
    Real samsung 30Q would last me someimes a whole day.
    I vape with 6 watts. Ifind when the battery gets to 3.8v there is not enough current to vape so I throw it in the charger

    would something like this be good enough to benchmark them?
    Sorry, I don’t know anything about the accuracy of that tester (or similar ones). You can test capacity with it but it’s easy to use fakes with the same capacity. Testing at higher current levels, 15A or 20A for the 30Q, is needed.
     

    Cartel

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    Oct 30, 2013
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    Chilliwack, BC
    I'll contnue over here.
     
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