This is a good performing cell that is slightly overrated. It appears to be the same cell that was used for the Golisi S35 and Efest 35A 3700mAh 21700’s when I tested them. This Eizfan runs a little hotter though so I have given it a 25A rating. Since they all might use the same cell the Golisi and Efest will need to be retested to see if they are also 25A now.
The capacity for the four Eizfan cells was 3857mAh to 4093mAh. China manufactured cells typically have worse cell-to-cell consistency, versus those from Samsung, Sony, etc., but this is a wider capacity range than I usually see. All of the cells I tested easily met their 3750mAh rating though.
Four cells were donated for the purposes of testing by Efan (https://efantech.en.alibaba.com). Thank you!
Ratings graphic: https://imgur.com/a/iLVHfoH
Test report: https://bit.ly/2FNZ2oz
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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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