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Bench Test Results: Aspire Unrated 1800mAh 18650...now using a different battery, performs worse

Discussion in 'Batteries and Chargers' started by Mooch, Oct 26, 2017.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    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 only 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.

    Cell photos: https://imgur . com/a/CwFKg
    (Sorry for the split link but direct links to Imgur do not display properly)


    Bottom Line
    This was a retest for this cell. In my previous testing it performed very well. Unfortunately Aspire has changed to a lower performing cell.

    This cell’s wrap originally said “40A” but now it has no rating. There is a paper “Aspire Battery Safety Chart” included when you buy one though. It seems to indicate that this cell has a claimed continuous rating of 20A and can be vaped with at up to 30A.

    I strongly disagree with Aspire’s decision to have no current rating on the wrap. Once that small piece of paper is misplaced then the only way to determine the cell’s claimed rating is to go to Aspire’s web site. This is an unacceptable burden on the vaper. Why not just have the rating on the wrap? Why should vapers have to work to determine if their use of this cell is safe or not?

    The previous version of this cell was strong competition for the Sony VTC5A for mechanical device users and those who needed the hardest hitting cell, i.e., the one with the highest voltage when pulsed.

    While this Aspire still hits as hard as the VTC5A for the first couple of draws it quickly drops in voltage as it discharges. The Sony VTC5A is clearly the better performer now, running for at least 40% longer when pulsed at high current levels done to 3.2V (about 3.6V at rest).

    I am rating this cell at 25A and 1800mAh.

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


    Continuous-Current Test Results
    Aspire NEW CELL 1800mAh 18650 Capacity Test.jpg Aspire NEW CELL 1800mAh 18650 CC Tests.jpg


    Pulse-Current Test Results
    Aspire NEW CELL 1800mAh 18650 Pulse Tests.jpg Aspire NEW CELL 1800mAh 18650 Pulse Tests ZOOMED.jpg


    Comparisons to the Earlier Aspire 40A 1800mAh and the Sony VTC5A
    Aspire NEW CELL 1800mAh 18650 CC Tests vs older cell.jpg Aspire NEW CELL 1800mAh 18650 Pulse Tests vs VTC5A.jpg Aspire NEW CELL 1800mAh 18650 Pulse Tests vs VTC5A ZOOMED.jpg


    Comments
    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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