Test Report Summary: This cell is an okay performer and its 15A rating seems reasonable but its cell to cell consistency is terrible. Based on the 30EF’s appearance, model number, and specs it appears that Efest wants to position this cell as an alternative to the Samsung 30Q. The Samsung 30Q is a MUCH more consistent performer though and runs for about 11% to 20% longer at 15A.
This Efest 30EF is essentially identical in appearance to the Imren 30QP. Only by using a 10x loupe could I see a couple of tiny tooling mark differences in the metal cans. In my opinion the Efest 30EF and Imren 30QP could be a mix of all the different grades of the same cell coming off the manufacturing line. This would explain their almost essentially identical appearance and their cell-to-cell performance inconsistencies. I do not know if this is true though.
The four cells I tested delivered 3031mAh to 3069mAh. This is okay consistency and exceeds this cell’s 3000mAh rating.
Four cells were donated for testing by NoSmoke AS (https://www.nosmoke.no). Thank you!
Ratings graphic: Imgur: The magic of the Internet
Full Test report: https://bit.ly/3pQDfjF
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These tests only note my personal ESTIMATED ratings for these batteries 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.
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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/