The costs of running this huge site are paid for by ads. Please consider registering and becoming a Supporting Member for an ad-free experience. Thanks, ECF team.

Busbars 25A 1750mAh 18650 Bench Test Results...accurately rated 25A, fantastic battery!

Discussion in 'Batteries and Chargers' started by Mooch, Jun 21, 2016.

Thread Status:
Not open for further replies.
Image has been removed.
URL has been removed.
Email address has been removed.
Media has been removed.
  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    These cells were donated for the purposes of testing by Cale at Sub Ohm Innovations. Thank you! To prevent any confusion with the eGo-type "batteries", I use the term "cell" here to refer to a single 18350, 18650, 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 discharging current" 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 image.jpeg image.jpeg image.jpeg


    Bottom Line
    This Busbar cell is a great performer and is accurately rated at 25A. I gave it an 1800mAh capacity rating, a bit higher than the claimed 1750mAh. It lists both the continuous and pulse ratings on the wrap and is the first cell to also list the pulse length and duty cycle for the pulse rating! This is fantastic and is a great step towards completely open and accurate cell ratings, thank you. The criteria for the pulse rating isn't known (temperature? cycle life? voltage sag?) but the voltage at 50A pulsed is good and is comparable to, or better than, other cells rated around 25A.

    It's supposed to be a "hybrid" chemistry cell (sometimes called INR), but its discharge curves are much more like an ICR cell than other hybrid cells like the 25R and VTC4/5. Like an ICR its voltage holds pretty steady before quickly dropping as the cell approaches empty. I haven't directly compared Busbars against the Tesiyi 40A 2600mAh or Aspire 40A 1800mAh ICR cells but hope to do so soon.


    Continuous-Current Test Results
    image.jpeg


    Pulsed-Current Test Results
    image.png image.png


    Comments
    • At 10A continuous it reached about 1678mAh. This is above average performance for a 1750mAh cell at 10A so I am rating this cell at 1800mAh.
    • At 15A continuous the temperature rose to 63°C. This is significantly below the average temperature of a cell running at its continuous discharge rating (CDR).
    • At 20A continuous the temperature rose to 71°C. This is a few degrees below the average temperature of a cell running at its CDR.
    • At 25A continuous the temperature rose to 80°C. This is just above the average temperature of a cell running at its CDR and is an indication that this is the cell's true rating.
    • At 30A continuous the temperature rose to 88°C. This is above the average temperature of a cell running at its CDR and is an indication that we're above the cell's true rating.
    • At 35A continuous the temperature rose to 97°C. This is significantly above the average temperature of a cell running at its CDR. The voltage is noticably sagging and is an additional indication that we're above the cell's true rating.
    • I am setting a CDR of 25A for this cell. Operating at that level would bring the temperature up to just above the average for a cell operating at its CDR. While operating any cell near its rated maximum current level causes damage to the cell, I would expect decent cycle life from this cell at 25A continuous.
    • I have included pulsed discharges but I haven't set pass/fail standards for pulse testing yet. The discharges were done at 5sec on/30sec off, down to 2.5V. One chart shows the entire discharge at each level. The other chart is zoomed in to show the first 5 minutes to make it easier to see the voltage sag at different current levels.
    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
    18350 Safety Grades and Pulse Performance Data | E-Cigarette Forum
    18650 Battery Ratings -- Picking a Safe Battery to Vape With | E-Cigarette Forum
    26650 Safety Grades and Pulse Performance Data | E-Cigarette Forum
     
    • Like Like x 7
  2. Baditude

    Baditude ECF Guru ECF Veteran

    Apr 8, 2012
    Ridgeway, Ohio
    Thumbs up for another honest/reputable battery company. :thumb:

    Here's hoping that it is a trend.
     
    • Like Like x 4
  3. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser
    So does Busbar actually manufacture these cells?
     
  4. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    I would say no as it's much easier to contract out a run of the cell they like. Good question for them though! :)
     
    • Like Like x 2
  5. Mactavish

    Mactavish Ultra Member Verified Member ECF Veteran

    Jan 19, 2010
    New York
    Thanks Mooch!

    QUESTION: my Xtar VP2 manual says it supports these battery types:
    ICR
    IMR
    IFR

    INR, is not a supported battery, I'd like to try these as my Sony VTC-4's are getting old. Would my charger work for these Busbars?
     
  6. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Yes, the charging for IMR, ICR, and INR is the same and is done at the same voltage...4.20V. There are a few specialized INR batteries that require 4.35V but not the Busbars or the LG's, Samsung 25R and VTC4/VTC5 that are also INR.

    IFR requires a 3.6V charger.
     
    • Like Like x 2
  7. Mactavish

    Mactavish Ultra Member Verified Member ECF Veteran

    Jan 19, 2010
    New York
    Thanks, the VP2 does have multiple voltage settings, I never use. So with these I'll just charge as I do for my Sony batteries. THANKS!
     
Thread Status:
Not open for further replies.

Share This Page