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Cylaid 25A 3000mAh 18650 Bench Test Results...just an overrated 15A battery

Discussion in 'Batteries and Chargers' started by Mooch, Apr 30, 2017.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    To prevent any confusion with the eGo-type "batteries", I use the term "cell" here to refer to a single 18350, 18650, 20700/21700, 26650, etc.

    While the test results are hard data, the conclusions and recommendations I make based on these tests are only my personal opinion based on my criteria for setting a rating. Carefully research any cell you are considering using before purchasing.

    Testing cells at their limits is dangerous and should never, ever, be attempted by anyone who has not thoroughly studied the dangers involved and how to minimize them.

    If the cell has only one current rating number on it, or if it says "max" then I have to assume that the company is stating that the cell can be discharged at that current level in any way, including continuously.

    IMG_5178.JPG IMG_5179.JPG IMG_5180.JPG IMG_5181.JPG

    Bottom Line
    This Cylaid is an overrated cell with a useless pulse rating. It matches the Sony VTC6 in both appearance and in performance.

    While this cell has the claimed 25A rating in fine print on the wrap it has an even more useless 40A "max pulse discharge" rating on the wrap too. It also features "40A" in a larger font which many people will use as the cell's rating when shopping or when a vendor displays it on their web site. For these reasons I feel the large "40A" rating, or any "pulse" rating, is misleading and shouldn't be used.

    My thanks to Cylaid for donating the two cells for testing! (Shenzhen Cylaid Technology Co., Ltd. - Electronic products,E-cigarette)

    Continuous-Current Comparison to Sony VTC6

    Pulse-Current Test Results
    No pulse testing was done as this is a Sony VTC6 rewrap.

    Always Remember
    ⁃ There is no 18650 with a factory/manufacturer rating over 30A continuous.
    - There is no 3000mAh 18650 that can have a rating over 20A continuous.
    ⁃ There is no 3100mAh-3600mAh 18650 that can have a rating over 10A continuous.
    ⁃ There is no 18650 available to vapers that has a capacity rating over 3600mAh.

    • At 10A continuous this cell delivered 2869mAh. This is good performance for a 3000mAh rated cell so I am rating it at 3000mAh.
    • Its temperature of 77°C at 20A continuous is just below the average for cells being operated at their rating so I am rating this cell at 15A.
    To see how other cells have tested and how hard you can safely push them, check out these links: List of Battery Tests | E-Cigarette Forum
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