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Bench Retest Results: Sanyo NCR2070C 20700...fantastic performing 30A battery

Discussion in 'Batteries and Chargers' started by Mooch, Mar 20, 2019.

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  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, Sanyo, or Molicel can change at any time! This is one of the hazards of using “rewrapped” batteries 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.

    You are responsible for your own safety! These batteries are designed and manufactured only for use in a battery pack with the proper physical and electronic protection. They were not designed for vaping (electronic cigarette) use or for use without battery pack protection circuitry. Use of these batteries is AT YOUR OWN RISK! 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.

    F3F542C3-CA28-4E76-A2B7-BB569C4B5F13.jpeg 494B3CC5-4980-4A2E-B008-C2B7D17B2054.jpeg 8CE4995D-2AD3-40F4-B321-C92524A01C45.jpeg 4ABFB118-F2B4-4070-AFB3-207B8666A18B.jpeg

    Bottom Line
    This is a retest of the best performing 20700 we can get right now, beating both the Sanyo NCR20700A and Molicel INR20700A.

    The Samsung 30T, 40T, and the Molicel P42A 21700’s all outperform this cell but they are a different size. The Samsung 30T hits the hardest but the Molicel P42A will run for longer at both 10A and 30A.

    The two NCR2070C’s I tested delivered 3503mAh and 3518mAh at 0.7A (0.2C) down to 2.5V. This is good consistency. I am giving these Sanyo’s a capacity rating of 3500mAh.

    The datasheet for this cell does not list a continuous current rating but a discharge graph shows a continuous discharge at 30A and this cell’s temperature at 30A is consistent with other 30A-rated cells. I am estimating its current rating to be 30A.

    Two cells were donated for the purposes of testing by 18650BatteryStore (18650 Battery Store | 18650 Lithium Ion Batteries, Chargers and Wraps). Thank you!

    Continuous Current Discharge Graphs
    2C0E1099-0688-4D18-91A8-414CCDA08CF9.jpeg 76E88DBB-D099-4657-BB90-1A1609F82294.jpeg

    Ratings Graphic

    Performance Specs
    - DC Internal Resistance = 15.7mOhms (milliohms) average for the two cells.
    - Total energy delivered down to 3.2V at 10A continuous = 10.0Wh (Watt-hours) average
    - Total energy delivered down to 3.2V at 20A continuous = 8.6Wh (Watt-hours) average
    - Total energy delivered down to 3.2V at 30A continuous = 6.7Wh (Watt-hours) average

    I want to work for the vaping 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 and testing news and a say in what I test then please consider becoming a patron and supporting my testing efforts: Battery Mooch is creating battery tests and educating vapers | Patreon.

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