Test Report Summary: This cell is not a good performer but its 15A rating seems reasonable. The Samsung 30Q runs for about 40% longer at 15A.
This Imren 30QP is essentially identical in appearance to the Efest 30EF but the Efest performs a lot better (but still not as well as the Samsung 30Q). I do not know if they are different grades of the same cell or not.
The two cells I tested delivered 3049mAh and 3066mAh. This is very good consistency and exceeds this cell’s 3000mAh rating.
Two cells were purchased for testing by me from Liion Wholesale (http://www.liionwholesale.com).
Ratings graphic: Imgur: The magic of the Internet
Full Test report: https://bit.ly/3wkUYCi
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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.
Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of property damage, personal injury, or even death. They are not supposed to be used outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous current rating and keep the plastic wrap and top insulating ring in perfect condition.
Testing batteries at their limits is dangerous and should never 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.
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/