Turnigy Graphene 65C 1800mAh 3S LiPo Pack Bench Test Results...only a 28C/39C pack, but a great one

Discussion in 'Batteries and Chargers' started by Mooch, Mar 23, 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, 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 Graphene is a great performing, low internal resistance pack but it is overrated.

    Vaping at its 117A (65C) rating, which I am presuming is a useless "pulse" rating and not a continuous current rating, would quickly bring the pack voltage down to about 10V and quickly heat the pack up past Turnigy's max temperature rating unless vaping slowly. This cannot even be considered a 65C (117A) pulse-rated pack unless the pulses are short and far between and you don't mind the huge voltage sag at 117A.

    This is a great performing pack though, easily beating out packs with higher internal resistances which causes greater voltage sag and higher temperatures.

    But, as is always the case, there are tradeoffs for this better performance. This Turnigy Graphene pack is thicker than many other poorer performing packs, 27mm versus about 21mm. It is also heavier, 188gms versus the 145-160gms of other packs. But if this pack's larger size and greater weight isn't a problem then it's a great choice for higher current applications.

    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) = 50A (28C)
    Maximum Vaping Amps rating (MVA) = 70A (39C)
    MaxSafe rating = 90A
    Average Pack IR = 13.65mOhms
    Average Cell IR = 3.1mOhms
    Dimensions/Weight = 106 x 35 x 27mm / 188gms

    IR = Internal Resistance
    mOhms = milliohms


    Continuous-Current Test Results
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    Pulse-Current Test Results
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    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.

    MVA = Maximum Vaping Amps rating. To help prevent overheating during chain vaping and for a safety margin in case of mod malfunction, don't exceed the MVA rating. It helps to limit the pack temperature to 60°C or lower.

    MaxSafe = Maximum Safety Amps rating. To help prevent the possibility of venting or thermal runaway in case of a mod malfunction or accidental button press never go over the MaxSafe rating. It helps to limit the pack temperature to 80°C or lower. The pack can still be damaged, perhaps permanently, at this temperature though.


    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
     
  2. Barkuti

    Barkuti Senior Member

    May 3, 2016
    Wow! I am blown away! This is power delivery! At least a 3S3P config with the best high drain 18650s would be needed to get even close.
    I suspect these things are meant for radiocontrol airplanes and/or cars. Yet, what the hell? At a ≈36A discharge rate, you're out of fuel in less than 3 minutes. Guess they don't have time to play with themselves, LoL! :lol:

    This pack really lives up to its capacity rating.
    By the way, I've observed that, for certain cell chemistries, you seem to slightly overspec their capacity. I say this because certain chemistries come to a SoC point at which their discharge curves just collapse so steeply that not even at the slowest discharge rate would they meet the rating. Just a remark. :2c:
    Thanks for your efforts. :)

    Cheers [​IMG]
     

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