Bench Test Results: Cylaid Yellow 60A 3100mAh 18650...Sony VTC6 with preposterous pulse rating

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Mooch

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  • May 13, 2015
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    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.

    6670756F-BC64-4DDC-8F27-169D37856C6A.jpeg FBD97255-0D18-4658-9F3F-DC495FCEE6BE.jpeg 0B16AC28-3C8B-4852-BB62-02A146956F8B.jpeg 269AE4D6-8932-45FB-A2D4-E1FD2FA66804.jpeg


    Bottom Line
    In my opinion this is a rewrap of the Sony VTC6, appearing and performing identically to the Sony.

    This Cylaid’s 40A continuous rating is hugely exaggerated as Sony rates the VTC6 at 15A continuous. Operating at higher current levels is mentioned in the datasheet but you must not exceed its 80°C maximum temperature rating. Rating this cell at 40A is outrageous.

    This Cylaid’s 60A “pulse” rating is useless as we don’t know the width of the pulses, the time between them, and the criteria used to set the rating.

    The Sony VTC6 is rated at 3000mAh so this Cylaid’s 3100mAh capacity is exaggerated too.

    I am estimating this cell’s ratings to be the same as Sony’s ratings for the VTC6; 15A continuous, higher if not allowed to reach 75°C, and 3000mAh.

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


    Continuous Current Discharge Graph
    B1CB9A3B-CEAF-4455-AADB-AD60842DC61B.jpeg


    Ratings Graphic
    91C69165-53E8-4D46-9612-04CD5915E046.jpeg

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