Bench Test Results: LG M50LT - 14.4A 4932mAh 21700

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Electron Wrangler
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May 13, 2015
    These tests below only note my personal ESTIMATED ratings for the batteries I tested at the time I tested them. Any battery that is not a genuine Samsung, Sony, Murata, LG, Panasonic, Molicel, 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 property damage, personal injury, or even death. They should never be used outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous discharge rating (CDR), never let it get colder than 0°C or hotter than 60°C, and keep the plastic wrap and top insulating ring in perfect condition. Never use a battery that is physically damaged in any way.

    Testing batteries at their limits is dangerous and should never 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.

    F6B55B53-81A5-40D4-85AE-155A31B96410.jpeg 384253CF-5F8D-453A-B581-5E86616A2622.jpeg 840FB803-72E9-41A5-8F6B-DB102C41D025.jpeg 942FD397-F13E-4532-A3FD-481EBCC9CE9D.jpeg 83E1B28B-0F11-4B35-BB85-C5C9ED0253C0.jpeg

    Test Results
    This is a fantastic performing “energy” cell (high capacity, made for long run times at lower power levels) but be aware of the reduction in its current rating at higher ambient temperatures.

    This cell outperforms both the Samsung 50S and BAK N21700CG-50 at 5A. At 10A the Samsung 50S beats this cell by a few percent but the M50LT still performs a touch better than N21700CG-50. This makes the LG M50LT one of the best performing 21700’s we can buy. I have not tested its cycle life yet though.

    See my 21700 Ratings and E-Scores table (link below) to see how this cell performed against others.

    The preliminary datasheet for this cell lists a 14.4A “Max. Discharge Current” rating but that is only for 10°C-25°C room temperatures! At above 25°C the current rating starts dropping and is only 7.2A by the time the ambient temperature reaches 55°C. These higher temperatures are common in battery packs where each cell heats up the others around it and the cells are in a case or wrapped in insulating materials and heat shrink plastic. Never exceed 70°C cell temperature!

    So while you can run this cell at 14.4A if at room temp or cooler I recommend staying at 10A or lower to help improve performance (reduce voltage sag), extend cell life, and reduce the risk of the cell getting too warm.

    The top contact of this cell is recessed more than most cells so these cells cannot be directly stacked in a vaping device. The top contact metal is also thinner than most cells and the “legs” coming down from it are narrow so I recommend not using this cell where there is a lot of pressure on the top contact.

    The two cells I tested delivered 4843mAh and 4850mAh. This is fantastic consistency and is typical of cells from the big manufacturers. The cells I tested didn’t meet LG’s 4923mAh typical capacity rating but they were over the 4770mAh minimum rating.

    I strongly recommend reading the datasheet for this cell before using it:

    Two cells were purchased for testing by me from 18650BatteryStore (18650 Battery Store - Lithium Ion Batteries, Chargers and Accessories).

    18650 Ratings and E-Scores Table:
    18650 Battery Ratings Table | E-Cigarette Forum

    20700/21700 Ratings and E-Scores Table:
    20700/21700 Battery Ratings | E-Cigarette Forum

    Continuous Current Discharge Graphs

    Ratings and Performance Specs Graphic

    I want to work for the community full time! If you feel what I do is worth a couple dollars a month and you would like early access to battery availability, battery and charger testing and news, and a say in what I test, then please consider becoming a patron and supporting my testing efforts: Battery Mooch is creating battery and device tests | Patreon.

    To see how other cells have tested check out this link: List of Battery Tests | E-Cigarette Forum


    Vaping Master
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  • Nov 29, 2010
    Clown World, USA
      Reactions: Oregon Linda


      Senior Member
      ECF Veteran
      Mar 20, 2021
        i guess you must've bought these back before 18650batterystore stopped selling LG. I can't find a reputable retailer that sells LG anymore. If they do have them listed, they've been out of stock for about a year now.

        Got mine at 18650bs maybe 2 weeks ago, sold out pretty fast I guess. Thinking they're not gonna stock LG any longer? I like molicel more anyhow if near comparable
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