This is one of the most overrated cells I have ever tested. Do not buy it.
The EHPRO Facebook page says it’s a 40A cell and the wrap has large letters that rate this cell at 40A “max”. The EHPRO web site does not have this cell on it.
On the wrap, in the tiniest lettering I’ve ever seen on a cell, it says it’s rated 25A continuous and 40A “max pulse discharge”. This cell only delivered 56mAh (yes, only fifty-six) at 25A continuous down to 3.2V.
The 40A pulse rating is useless as we don’t know the pulse length, time between pulses, and the criteria they used to set the rating (Temperature? Voltage sag? Cycle life? A combination of those or other things?). We’re not able to compare this cell’s pulse rating to any other’s. Pulsing this cell at 40A would cause its voltage to instantly collapse anyway.
This is a disasterously poor performing cell. I am giving this EHPRO cell an estimated rating of 5A and unknown capacity as it’s not worth my time testing it further. Watt-hour and internal resistance measurements were not done due to its Do Not Buy recommendation.
Two cells were donated for the purposes of testing by EHPRO (http://www.ehpropower.com). Thank you!
Ratings graphic: https://imgur.com/a/NCDFk
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 the tables can change at any time as different grade cells appear on the market or we get swamped with fakes. Please, never assume that the ratings in the table 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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