Check out
@Mooch 's blog, he's got several tests on various
batteries. However I will say the Imren 40amp is to be handled just like the Efest Purple 38amp, they are both 20amp CDR, maybe 40amp Pulse but what that pulse time is, is not a standard could be 300ms to 4 seconds, not something you should risk. The LG and Samsungs are still better
batteries all around compared to the Imren Purples, I own two of the Imrens I got for testing, use them exclusively in my Sigelei Mini 30watt as far I trust them TBH. Looking for higher CDR amp rated
batteries then you have the Sony VTC4 and LG HB6 can handle 30amp CDR. But as it stands right now there is "NO 40AMP OR HIGHER CDR" battery on the market at the moment.