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.

Bench Test Results: Ampking 40A-50A 3000mAh 21700...performs identically to Samsung 30T

Discussion in 'Batteries and Chargers' started by Mooch, May 10, 2018.

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 tests below only note the estimated ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, LG, Panasonic, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.

    Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of personal injury or property damage. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition.

    Testing batteries at their limits is dangerous and should never, ever, be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.

    If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.

    B9F00137-607F-4237-B2B4-14F04155AE62.jpeg E5D78A63-19BE-4EDA-9124-C7919E91AC78.jpeg 279DB9F6-DD58-43EC-B60B-274CD44F57CE.jpeg 26876DC1-A075-4C10-AD88-6D0868D3869A.jpeg

    Bottom Line
    This cell performs identically to the incredible Samsung 30T, including temperature, but is in a different steel can. I was told it is a Samsung 30T by Ampking but I am unable to explain the use of a different can.

    The Samsung 30T and its rewraps, like this Ampking, are the highest performing and hardest hitting cells available to us as of May, 2018.

    This Ampking’s “40A-50A” current rating is exaggerated and undefined but the 3000mAh capacity rating is accurate.

    I am estimating this Ampking’s ratings at 35A and 3000mAh, same as the Samsung 30T.

    Two cells were donated for the purposes of testing by Ampking ( Thank you!

    Continuous Current Discharge Graphs
    0E34EECF-F121-4FAF-8251-A4C66B43479A.jpeg 635EAFE0-16F9-41E9-85C7-6B54C1F4A6CB.jpeg

    Ratings Graphic

    Performance Specs
    • DC Internal Resistance = 11.5mOhms (milliohms) average for the two cells.
    • Total energy delivered down to 3.2V at 10A continuous = 9.8Wh (Watt-hours) average
    • Total energy delivered down to 3.2V at 20A continuous = 8.7Wh (Watt-hours) average
    • Total energy delivered down to 3.2V at 30A continuous = 7.1Wh (Watt-hours) average
    To see how other cells have tested check out this link:
    • Like Like x 4
    • Informative Informative x 1
  2. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hundertwasser
    "I've told you a trillion times, don't exaggerate!"
    • Like Like x 1
  3. Barkuti

    Barkuti Super Member ECF Veteran

    What's up? :)
    By the way, this cell (Sammie 30T) could technically be rated “40A”, doesn't it?
    Of course this is not to judge Mooch's criteria, in fact I also identify myself with a sort of “cautious” approach, always better in the name of safety and usage lifespan. :pop:
    Looking forward for the INR18650-20S review. “S” is Samsung's new high discharge class surname for 18650s, I presume. Top class, by the way. :thumb:

    Cheers ;)
  4. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    No, it is a 35A battery. I did not invent a “cautious” rating for it...

  5. Barkuti

    Barkuti Super Member ECF Veteran

    Mmmkay, what I see here is that you are sticking to Samsung's official specifications for the 30T, doesn't it?
    You can do this here because you have the brand's spec sheet and you've been officially told this is a Samsung 30T cell, but these facts are not necessarily the norm. Like in many of your rewrap reviews, namely with cells coming from unknown chinese OEMs (like 26650s) for example. o_O
    Oh well, keep up the good work.

    Cheers :)
  6. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Yes, when the datasheet is available I will use those values (or lower if it’s an overrated China cell). :)

    I don’t understand how China cells figure in to this conversation though.

Thread Status:
Not open for further replies.

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice