Though Efest has overrated this cell a bit it is a good performer, beating the 10A Samsung 48G and 15A Sanyo NCR20700B for total vaping time at low power levels, under 7A/20W. It appears to be a rewrap of the LG M50 cell.
The two cells I tested delivered 4900mAh and 4957mAh at 1.0A (0.2C) down to 2.5V. Neither cell met its 5000mAh rating. Every cell should easily beat the capacity spec as it’s just a minimum guaranteed value. It should not be the maximum you can expect if you’re lucky.
LG rates the M50 at 4849mAh minimum to 5014mAh typical though so this Efest still meets LG’s specs.
I am estimating this Efest’s ratings to be 7.3A and 4900mAh.
Two cells were donated for the purposes of testing by Brad’s Vapor (https://www.bradsvapor.com). Thank you!
Ratings graphic: https://imgur.com/a/7vfDjU6
Test report: https://bit.ly/2uHWbWi
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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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