Turnigy Nano-Tech 25C-50C 1800mAh 3S LiPo Pack Bench Test Results...only an ok 11C/28C pack

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Mooch

Electron Wrangler
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  • May 13, 2015
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    To prevent any confusion with the eGo-type "batteries", I use the term "cell" here to refer to a single 18350, 18650, 26650, LiPo pouch, 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 or packs 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 or pack 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.

    image.jpeg image.jpeg


    Bottom Line
    This Turnigy Nano-Tech is only an ok performing pack and is overrated.

    Discharging this Turnigy Nano-Tech at its 45A (25C) continuous current rating would quickly bring the pack voltage down to about 10.5V and quickly heat it up past Turnigy's max temperature rating, causing the pack to puff. This cannot even be considered a 50C (90A) pulse-rated pack unless the pulses are short and far between and you don't mind the huge voltage sag at 90A.

    CAUTION: LiPo's use the most volatile of the Li-Ion battery chemistries and can cause extreme injury if abused. Never use a LiPo unless the cells, wraps, wiring, and connector are in perfect condition. Never exceed the CDR of the LiPo unless you understand and accept the risks involved. You are responsible for your own safety, be careful!


    My Ratings
    Capacity = 1800mAh
    Continuous Discharge Rating (CDR) = 20A (11C)
    Average Pack IR = 18.75mOhms
    Average Cell IR = 4.5mOhms
    Dimensions/Weight = 105 x 34 x 21mm/ 147gms

    IR = Internal Resistance
    mOhms = milliohms


    Continuous-Current Test Results
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    Pulse-Current Test Results
    image.png image.png


    Comments
    CDR = Continuous Discharge Rating. The nearest 5A-multiple of constant-current continuous discharge current that brings the inner cell of a 3S pack to a temperature of 60°C. This is what the LiPo assemblers recommend as the max running temperature so it makes sense to use it as the rating. Especially since the inner cell will be hotter internally than this temperature, perhaps considerably.


    Links
    LiPo ratings table: LiPo Pack Safety Grades and Performance Table | E-Cigarette Forum

    To see how other packs and 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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