Orbtronic SX30 30A 2100mAh Button-Top 18650 Bench Test Results...a 23A cell at best

Discussion in 'Batteries and Chargers' started by Mooch, Jun 20, 2015.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Tested at 10A-30A constant current. The cells were purchased from Orbtronic and donated for testing.

    Dropbox - orbtronic sx30 wrap.jpeg

    Dropbox - orbtronic sx30 button1.jpeg

    Dropbox - orbtronic sx30 can.jpeg

    Dropbox - orbtronic sx30 top.jpeg

    Dropbox - orbtronic sx30 bottom.jpeg


    Bottom Line
    At best, this is a 25A continuous discharge current (CDR) cell. Even then, it performs poorly when compared to other supposedly lower-rated cells like the Samsung 30Q and LG HG2.


    Test Results
    Dropbox - orbtronic sx30 30a 2100mah 18650 constant-current tests.bmp


    Comments
    - The button top was spot-welded on in only four places, resulting in a fairly high resistance connection to the cell.
    - Cell temperatures at 30A reached 97°C (way too hot!) and the voltage drop was huge.
    - After just ten cycles at 30A there was visible "voltage sag" in the discharge curve and a 10% loss in capacity, indicating damage to the cell.
    - Using a 3.2V cutoff, the SX30 only delivered about 300mAh at 30A and even the lower current discharges showed low capacity.
    - I haven't tested the VTC4 yet but through 20A both the 30Q and HG2 run cooler, run at higher voltage-under-load (i.e., they "hit harder"), and last longer than the SX30. The 30Q and HG2 could still be a better choice even at 25A but will suffer damage, as would the SX30.
    - The flat-top version of this cell will give higher voltage-under-load numbers but the temperatures will still be too high to run the cell at 30A without fast damage. Even at 25A, in my opinion, there will be a short cycle life for this cell. I hope to test the flat top version at some time in the future.

    I know this is a popular cell to recommend for builds requiring more than 20A but unless the flat-top version performs significantly better this cell is not a good choice in my opinion.
     
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  2. State O' Flux

    State O' Flux Vaping Master Verified Member ECF Veteran

    Jul 17, 2013
    Seattle
    Moochy is on a big time battery roll now... boys and girls. As long as you're willing to put in the time and effort Mooch... I'm willing to give you your customary 'attaboy... and read 'til I run out of coffee. [​IMG]
     
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  3. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Thanks!
    Could use a good use a good cup of that right now. :)
     
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  4. State O' Flux

    State O' Flux Vaping Master Verified Member ECF Veteran

    Jul 17, 2013
    Seattle
    I got lots of coffee... but I'm sure running out of steam.
     
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  5. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    I'm trying to think of some clever way to tie in your running out of steam with your link to the Steam Engine and come up with something witty to post...but I can't. :(
     
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  6. Wraith504

    Wraith504 Ultra Member Verified Member ECF Veteran

    Aug 25, 2014
    New Orleans, LA
    That thing really takes a dump at 30A doesnt it. LOL
     
  7. Cullin Kin

    Cullin Kin Ultra Member Verified Member ECF Veteran

    Jun 28, 2014
    The 3Oh!3, Colorado
    Wow! Dude, you are awesome. Thank you for testing these cells like this. You have no idea what that means to us. As State O' Flux said, Atta-boy!

    I'm curious... Do you have the ability to testing these ridiculous 'pulse discharge' ratings everyone seems to be claiming? I would love to see some data on those. I would be happy to donate 2 slightly used VTC4's just to see it done...
     
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  8. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Up to 300A. :evil:
    I'll PM you my address.
     
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  9. State O' Flux

    State O' Flux Vaping Master Verified Member ECF Veteran

    Jul 17, 2013
    Seattle
    More like all the unstated time frame, pulse discharge values being promoted at continuous... or my new personal favorite set of weasel words... "Super High discharge 40A".
     
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  10. State O' Flux

    State O' Flux Vaping Master Verified Member ECF Veteran

    Jul 17, 2013
    Seattle
    I gotcher 300A right here... buddy. [​IMG]
     
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  11. Cullin Kin

    Cullin Kin Ultra Member Verified Member ECF Veteran

    Jun 28, 2014
    The 3Oh!3, Colorado
    This will be fun!
     
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  12. State O' Flux

    State O' Flux Vaping Master Verified Member ECF Veteran

    Jul 17, 2013
    Seattle
    You're in charge of making the guacamole. :rolleyes:
     
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  13. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    LOL...my girlfriend heard me laughing so she read your post. She's not quite sure what to make of it. :)
     
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  14. Cullin Kin

    Cullin Kin Ultra Member Verified Member ECF Veteran

    Jun 28, 2014
    The 3Oh!3, Colorado
    Hey now! I'm already donating the batteries... I have to make the guacamole too??!?!?
     
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  15. State O' Flux

    State O' Flux Vaping Master Verified Member ECF Veteran

    Jul 17, 2013
    Seattle
    Tell her that's vapedude shorthand for 300 millimeters.... folded in half. :thumb:
     
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  16. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Well, I'm risking the house fire so don't look at me. ;)
     
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  17. State O' Flux

    State O' Flux Vaping Master Verified Member ECF Veteran

    Jul 17, 2013
    Seattle
    Hey... I'm bringin' the Kahlua... yer' gettin' off cheap.
     
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  18. Cullin Kin

    Cullin Kin Ultra Member Verified Member ECF Veteran

    Jun 28, 2014
    The 3Oh!3, Colorado
    You both bring up valid points. Okay, I'll order some guac from Chipotle... We'll need something to dip in the guac though? Or will we just be guzzling Kahlua and pounding guac while watching these battery tests?
     
  19. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Bringin' da guac means bringin' da chips too.

    And now, back to our regularly scheduled programming...
    The next cell in testing...HB6
     
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  20. Cullin Kin

    Cullin Kin Ultra Member Verified Member ECF Veteran

    Jun 28, 2014
    The 3Oh!3, Colorado
    I didn't even know LG made a supposed 30A CDR battery... This will be interesting!
     
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