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Bench Test Results: Hohm Tech Hohm Work 2 – 25.3A 2547mAh 18650...accurately rated, great performer

Discussion in 'Batteries and Chargers' started by Mooch, Nov 8, 2019.

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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.

    300BBB18-3AC7-4460-B56E-73841FC9AE11.jpeg FAA01CA1-C0A5-494A-8EEA-0F919C30A9E1.jpeg 49752871-17D9-40C7-9836-D5095893B3EE.jpeg 358DE867-BCBE-4242-8AA6-3996F41ED5C7.jpeg


    Bottom Line
    This is an accurately rated cell that performed slightly better than the Sony/Murata VTC5A and about the same as the VTC5D in my testing. The Molicel P26A still performs better than the Hohm Work 2 though. I am rating the Hohm Work 2 at 25.3A.

    The four cells I tested delivered 2625mAh to 2667mAh. This is decent consistency for a cell not manufactured by one of the big OEM’s (Samsung, Murata, etc.). I am rating them at 2547mAh.

    In my opinion the ratings set by Hohm Tech are confusing. Especially considering that normal cell-to-cell differences are greater than the 0.1A precision Hohm Tech uses for their current ratings and the one mAh precision they use for the capacity ratings. Any cell could easily have a current rating difference greater than 0.1A and a capacity difference greater than two or three dozen mAh from another cell in the same batch.

    The tiny print used for some of the ratings on the wrap is hard to read too and is made even more so due to the patterned background they’re printed on. I also don’t like the large “max” current rating on the wrap.

    D23D4F4E-530C-4C30-A9B3-AEFD63E6B4E5.jpeg 739C9913-81B3-4BBD-B85C-73DD196DCB24.jpeg 50AE45B9-E323-4472-89E3-3B69B28475B6.jpeg

    These are minor complaints though and Hohm Tech is already redoing all their wraps to focus on wattage-based ratings and without the “max” rating being so prominent. This is great to see happening.

    These cells were were sent to me by Hohm Tech for the purposes of testing (www.hohmtech.com). Thank you!


    Discharge Graphs
    120E805D-7B0B-4875-8958-A20AF086D9EC.jpeg 957E4068-E97A-4BA1-A3E4-50A0CE3E343E.jpeg


    Ratings Graphic
    8BCD2E2F-28C4-48F9-8D58-8390CE7378DB.jpeg


    Performance Specs
    - DC Internal Resistance = 13.8mOhms*** (milliohms) average for four cells.
    - Total energy delivered down to 3.2V at 10A continuous = 6.5Wh average.
    - Total energy delivered down to 3.2V at 20A continuous = 5.7Wh 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, 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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  2. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hundertwasser
    Thanks Mooch
     
    • Like Like x 1
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