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Bench Test Results: Vapcell G50 – 15A 5000mAh 21700...great performer but “max” rating issue

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

    7A5412F8-E71D-432F-8D61-7596475DE3B7.jpeg EDFE8AB7-3639-4C47-B1F7-65879AF8D3EE.jpeg A6EE9037-A86B-4CAD-86BB-F6B20DA413DD.jpeg 4E648304-FCD3-44C8-A2A9-59D16E614AB5.jpeg


    Test Results
    The Vapcell G50 is a great performing ultra-high capacity 21700 cell. These beat the blue Vapcell 12A 5000mAh, Samsung 50E, and Samsung 50E2. Vapcell says they are rewrapped Samsung 50G cells and they look and perform essentially the same as the Samsung 50G. Vapcell’s use of a “max” current rating is a problem though.

    Samsung gives the 50G a 9.8A continuous rating and a 14.7A non-continuous (“temperature-limited”) rating. This means you can use it at 14.7A as long as the cell temperature does not go over 60°C/140°F. The 9.8A rating is what you must use when comparing this cell to others. Hard use of this cell can bring it to 60°C so don’t let it get more than warm.

    The capacity of the two cells I tested was 4978mAh and 4979mAh. While this is extraordinary consistency, typical for cells from the big manufacturers like Samsung, they failed to meet the 5000mAh rating Vapcell gave them. The cells I have cannot be the lowest capacity cells in the batch either. I am rating the Vapcell G50 at the same 4900mAh rating Samsung gives them. Why Vapcell decided to exaggerate this rating is a mystery to me and frustrating.

    Two cells were sent for the purposes of testing by Vapcell (www.vapcelltech.com). Thank you!


    Continuous Current Discharge Graphs
    7546979C-EDCA-465C-8640-C6DB6D748DE0.jpeg EC15A81C-1AD8-4624-A4C0-037219FBFBF8.jpeg


    Ratings Graphics
    16C64874-EBF2-4244-80C5-07AC12B587F2.jpeg 94B382F4-517F-4657-AB84-52AEB0CBBF3A.jpeg


    Performance Specs
    • DC Internal Resistance = 20.0*** (milliohms) average for the two cells.
    • Watt-hours (energy) delivered at 15W (5A) down to 3.2V = 14.0Wh
    • Watt-hours (energy) delivered at 30W (10A) down to 3.2V = 12.3Wh
    • 2-sec puff count at 15W (5A) = 1,680
    • 2-sec puff count at 30W (10A) = 738
    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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