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Bench Test Results: Golisi S26 25A 2600mAh 18650...almost accurately rated, useless “max” rating

Discussion in 'Batteries and Chargers' started by Mooch, Jul 9, 2018.

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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, LG, Panasonic, 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 protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition.

    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.

    A5AF152F-61BA-4A0D-940F-5E6D76E77740.jpeg 3B4CA8D9-E822-4601-A21E-8AB0B9F5995F.jpeg F0BDDCE8-20B3-4818-8743-195171A6C3A4.jpeg 0951C00E-5A5A-494A-9CEF-1616DC700DBD.jpeg


    Bottom Line
    While this cell has a useless large 35A “max” current rating on the wrap it has an accurate continuous current rating. Its capacity rating is slightly exaggerated though.

    I am thrilled that the continuous discharge rating (CDR) is mentioned on the wrap but I hate seeing the use of a “max” current rating. I hope Golisi removes the max rating soon.

    The four cells I tested delivered 2577mAh, 2580mAh, 2586mAh, and 2600mAh at 0.5A down to 2.5V. Only of the four met its 2600mAh rating and barely at that.

    These cells performed pretty well. While the Sony VTC5A outperforms it for the first half of a 25A discharge this cell matches the VTC5A for the rest.

    I am estimating this Golisi’s ratings at 25A and 2550mAh.

    Golisi wanted our community to know that they have product liability insurance for their batteries. I don’t know the specifics of what benefits this offers to vapers or vendors. Contact Golisi for more information.

    Four cells were donated for the purposes of testing by Golisi (Home). Thank you!


    Continuous Current Discharge Graphs
    10B16360-E47C-4483-9028-39E32ED57B56.jpeg EE9E161C-9CA7-494B-B71A-EE79D6F00203.jpeg


    Ratings Graphic
    435AB226-7A95-40FC-9485-9439C74AD7A1.jpeg


    Performance Specs
    - DC Internal Resistance = 18.7mOhms (milliohms) average for the two cells.
    - Total energy delivered down to 3.2V at 10A continuous = 6.7Wh (Watt-hours) average
    - Total energy delivered down to 3.2V at 20A continuous = 5.3Wh (Watt-hours) 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 and testing 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.

    Golisi paid a fee to be moved to the front of the testing queue, which currently has a 10-12 week backlog. This cannot influence my test results as they pay in advance, have no say about what is in this report, and I don’t care if any company never does this or donates batteries again. My reputation is a lot more important than any battery donation or payment.

    To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum
     
    • Like Like x 2
  2. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser
    Regarding the insurance -
    I'm highly suspicious. It's unprecedented and I would have thought ill-advised move by any battery company to offer liability insurance because of the potential for misuse by the user.
    I had a read through the document and got a bit lost in the legalese so I'm not sure of it's worth.

    Overall limit - $2,000,000
    Limit for one accident - $300,000
    Limit per person/injury - $150,000


    I did notice the following exclusion which I thought was semi amusing.

    Liability directly or indirectly from nuclear fission, nuclear fusion, nuclear weapons, nuclear material, unclear radiation and radioactive contamination.

    The unclear is clearly a typo, something one wouldn't expect to see in a legally binding document.
     
    • Agree Agree x 1
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