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Capacity measured

  • viamer Sunday, May 20, 2012 3:27 AM Reply
    I got a pair of this batteries, ordered 25.03.2012, send 08.04.2012.
    They are 2225 and 2421 mAh (1A discharge current, after 2 cycles).
    Please everybody who can measure capacity, post here results of yours.
    So we will know if DX will begin to sell fake batteries.
    Excuse my poor english.
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  • Prepperandflash Sunday, May 20, 2012 4:45 AM Reply
    They always do. Why do you think its rated "3000mAh". Note the " ".
    404: Signature not found
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  • Dragonsam Thursday, May 24, 2012 9:24 AM Reply
    @viamer:
    "They are 2225 and 2421 mAh"

    Very disappointed that those numbers are way off even the supposed Actual Capacity: 2500~2600mAh

    Thanks for the heads up.
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    post edited by Dragonsam on 5/24/2012 at 2:34 PM
  • sheepish Top 10 Forum Poster Wednesday, May 30, 2012 10:24 PM Reply
    I've just run a test on one cell using a fixed resistance. Down to 3V it got 2147mAh, to 2.58V it got 2532mAh. It didn't hold a very good voltage during the test. I will not be buying any more of these, more because of the voltage under load than because of the capacity.
    DX has found a new way to deceive customers:
    Use reviews for different products that have not been bought
    by the person who wrote the review.
    http://club.dx.com/forums/forums.dx/threadid.1462252
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  • Dragonsam Thursday, May 31, 2012 12:52 AM Reply
    @sheepish,

    Your finding literally put "icing" on the battery.
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  • sheepish Top 10 Forum Poster Thursday, May 31, 2012 1:26 AM Reply
    Remember that colloquialisms don't translate well between countries, let alone across languages... I have no idea what you mean.
    DX has found a new way to deceive customers:
    Use reviews for different products that have not been bought
    by the person who wrote the review.
    http://club.dx.com/forums/forums.dx/threadid.1462252
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  • Dragonsam Thursday, May 31, 2012 3:39 PM Reply
    The "icing" supposed to impart:
    1. throwing 'cold' water on the battery, and
    2. the last straw as in the icing on the cake.

    Sorry for my feeble attempt at humor.
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    post edited by Dragonsam on 5/31/2012 at 3:40 PM
  • sheepish Top 10 Forum Poster Thursday, May 31, 2012 4:21 PM Reply
    Ah. The icing on the cake is a good thing that tops off another good thing, which I didn't think you meant. To put something on ice in to pause using it, which is not necessarily good or bad, but I'm completely giving up on buying them again, not pausing. The last straw/straw that broke the camel's back is a bad thing. For me, yes, this test was the final straw (the last in a series of unpleasant events which finally makes you feel that you cannot continue to accept a bad situation). I am not going to buy poor quality or variable quality cells any more. The trouble is that this cell (from another shop) tested well in respected Internet tests, so I had high hopes for it.

    I'll test the next one today then post a graph. I think DX's Sanyo cells are a much better buy; I'll be getting them next time, although they're available elsewhere for less.
    DX has found a new way to deceive customers:
    Use reviews for different products that have not been bought
    by the person who wrote the review.
    http://club.dx.com/forums/forums.dx/threadid.1462252
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  • Dragonsam Thursday, May 31, 2012 11:34 PM Reply
    @sheepish,
    You explained far better than I ever could.
    Looking forward to reading your next test result.
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  • sheepish Top 10 Forum Poster Friday, June 01, 2012 12:34 AM Reply
    I've done the test, just wanted to post it with a cute graph to get the graph on the first page of this thread. For most of the time the second cell held a slightly higher voltage than the first cell. They are similar enough it's clear they're of the same brand/type and maybe even batch, considering how inconsistent the TrustFire cells are between batches - as I said, these aren't the same as were tested elsewhere on the 'net, and the TF2400 "flames" have changed as well. Anyway...

    TrustFire "3000" cell A: Down to 3V 2147mAh, down to 2.58V 2532mAh.
    TrustFire "3000" cell B: Down to 3V 2203mAh, down to 2.55V 2534mAh.

    In the graph I've compared them with a couple of batches of the once-popular TrustFire 2400 "flame" cells, and a retest of one of the earlier TF2400 batch after I noticed that cell now has high self discharge. (It's not much used at all.) The rise in the middle of the graph for cell A is due to a high resistance contact I sorted out mid-test.

    Edit: TinyPic deleted the file after less than a month. They say pics get 90 days of non-viewing. Here it is again.

    http://i47.tinypic.com/2ujl1r6.gif
    img src: http://i47.tinypic.com/2ujl1r6.gif



    Edit 2: The original link was reused by TinyPic so I've removed the link. I should have done it at the last edit.
    DX has found a new way to deceive customers:
    Use reviews for different products that have not been bought
    by the person who wrote the review.
    http://club.dx.com/forums/forums.dx/threadid.1462252
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    post edited by sheepish on 11/18/2012 at 4:23 AM
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