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Bench Test Results: Sony VT4 (not VTC4)...a 20A 2000mAh battery, VTC4 performs better

Discussion in 'Batteries and Chargers' started by Mooch, Jul 17, 2018.

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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, 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.

    155ECE8A-F6EE-4825-87E1-059BCEF79B4D.jpeg 5D7ECEF9-2D64-46F4-9E0C-8E35CF54364B.jpeg 9F3D253A-908F-4F5C-AE3D-2FF93F409E79.jpeg CCFD3322-EF04-449D-974F-8FAE202971C4.jpeg


    Bottom Line
    This is the VT4, not the VTC4. While both are similarly rated the VT4 didn’t perform as well.

    The two cells I tested delivered 2130mAh and 2156mAh at 0.4A (0.2C) down to 2.5V. This cell’s rated capacity is 2000mAh and its nominal capacity rating is 2100mAh. I try to use the rated capacity as that is the guaranteed minimum but I think most of them will deliver 2100mAh (at low current levels).

    The two cells ran a little hot at 22A in my testing, 83°C-84°C, for that to be their continuous rating. I am estimating this Sony’s ratings to be 20A and 2100mAh.

    While these are not bad performing cells at all the VTC4 performs better at 10A and much better at 20A. Considering the high internal resistance I measured for the VT4’s they could be lower grade cells as Sony does not overrate.

    Two cells were donated for the purposes of testing by 18650BatteryStore (http://www.18650batterystore). Thank you!


    Continuous Current Discharge Graphs
    184E858B-BCC3-44AA-9CAE-4F13B5B27C42.jpeg 7E8A28B7-C465-4090-8587-23346E8CD389.jpeg


    Ratings Graphic
    1705839A-604C-4968-B720-EBB0884F9EFC.jpeg


    Performance Specs
    - DC Internal Resistance = 27.9mOhms (milliohms) average for the two cells.
    - Total energy delivered down to 3.2V at 10A continuous = 5.7Wh (Watt-hours) average
    - Total energy delivered down to 3.2V at 20A continuous = 2.3Wh (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
     
    • Like Like x 7
    • Informative Informative x 1
  2. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser
    One to avoid then, that's unusual for Sony.
     
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