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Bench Test Results: Murata 2700mAh VTC5D 18650...great performer now bit worse than VTC5A

Discussion in 'Batteries and Chargers' started by Mooch, Mar 6, 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.

    73DF9742-73F8-4CC6-A927-930EF5709C62.jpeg 2DCF3698-D7D2-4181-9807-6FBBBCFB1340.jpeg D8CEE5C3-FF1E-4378-9E37-0C295110204B.jpeg BC39179D-1664-489C-8C97-BDC806334E9B.jpeg


    Bottom Line
    When I tested the Sony version of this cell in 2018 and the Murata version in 2019 it performed a bit better than the Sony/Murata VTC5A. The two sets of cells from two sources I just tested performed a bit worse that the VTC5A now though. Perhaps some of the VTC5D’s that are available now are a lower grade? I don’t know.

    The VTC5D is still a great performing cell but right now I personally wouldn’t pay more for them than what VTC5A’s cost. I don’t think you’ll notice any difference in performance between them.

    All of the VTC5D’s I have seen have the secondary bottom venting ring. If your “VTC5D” cells do not have the ring I cannot guarantee that this means they are fake but I have never seen a VTC5D without the ring.

    The bottom battery contact of a mod will press against the bottom venting ring of this cell. This could potentially interfere with venting of the cell if there was an accidental short circuit or incredibly rare internal defect. I don’t know how much of a safety issue this might be. As with all of the round cells we buy, use this cell at your own risk.

    Murata gives this cell a temperature-limited rating of 35A. This means Murata says you can use it at up to 35A as long as the cell temperature does not go above 90°C., which is incredibly hot. There is no continuous current rating in the datasheet. I am giving it a 25A rating as that is as high as you can go before exceeding my 80°C temperature limit.

    Using this cell at levels higher than this just accelerates its aging, shortens it overall life, increases the risks, and results in lower performance. If you are above 25A then I recommend using the Samsung 20S instead.

    The capacity for the four Murata VTC5D’s I tested ranged from 2740mAh to 2745mAh at 540mA (0.2C) down to 2.5V. This is astoundingly good consistency and is typical for good cells from the big manufacturers. I am rating these cells at at 2700mAh.

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


    Continuous Current Discharge Graphs
    6AC52491-8B0A-47E2-8A11-871974687AF7.jpeg


    Ratings Graphic
    E9FFD4A4-E032-4421-BDC4-AA6DC80179BC.jpeg


    Performance Specs
    • DC Internal Resistance = 17.3mOhms*** (milliohms) average for the four cells.
    • Watt-hours (energy) delivered at 10A down to 3.2V = 7.2Wh
    • Watt-hours (energy) delivered at 20A down to 3.2V = 4.4Wh
    • 2-sec puff count at 30W = 432
    • 2-sec puff count at 60W = 132
    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.
     
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