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 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!
Ratings graphic: https://imgur.com/a/ooWbW3x
Test report: https://bit.ly/2moUgl7
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These tests 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” 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. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s continuous current rating and keep the plastic wrap and top insulating ring in perfect condition.
Any rating in my ratings tables can change at any time as different grade cells appear on the market, we get swamped with fakes, or new information becomes available to me. Please, never assume that the ratings in the tables are permanent and will never change! Always download the latest version before considering any cell purchase.
To see how other cells have tested check out this link: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/
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