I am afraid I think my friend was correct in his preliminary tests, and these ARE HG2 Rewraps that were rejects.
No issues with the pair of HG2 I've got. I can Vape all the way down to 8-10% at 70W on my Sigelei 100W with no problems.
Not a bad battery just not worth the extra money. To get 3000mah you need to discharge them to 2.0V. The HE2/4, 25R and VTC4/5 all have a 2.5V cutoff. That means a lot of the extra capacity is trapped between 2.5V and 2V. In real terms you're lucky if you get an extra 200mAh out if them, maybe less at higher loads.
Really? So in reality, they are not 3000MAH, and are closer to the 25R's? That would explain a LOT.
I had been using the Efests in my Sig 75, but I was only using that at a maximum of 40W.
Today I decided to have a bit of fun, but didn't fancy using the 150W.
I used the Sig 75, and the batterys were charged 3-4 days ago. The first battery (Which I have rewrapped, I pulled one wrapper to look for markings underneath, there was none, so if they are LG they have sanded off the logo.
I tried to fire it with a RDA attached, My velocity in one of its 'beast mode' builds. Just 3MM 24 gauge coils (I think, they could be 26 but I am sure because there is around half a second ramp up it is 24, and the amount of turns I can see inside does not look like a 26 gauge build).
It sagged all the way to empty, and said check battery. The first battery would fire at 55 watts, it was one bar lower than full.
I pulled this battery, and put in the battery with its original wrapping. I fired at 75 watts, but the sag was still nearly to zero. If I use my 25R's, they do not sag this bad.
I am going to see how long I can get 70W working with these, but I think the samsung 25R is superior. I guess it was a combination of wishful thinking, believing Efest may of changed their ways, and my brain damage made me think these were better.
They DO perform better than my HG2 in the lower watt range, up to 30 Watts they last a lot longer.
So, I guess these are good for 20 amps, not for long though, and are B or C binned LG HG2's.
The search continues for a genuine, high amp battery.
I hear the 25R's can take a pulse of 45AMP for 5 seconds? Is this true? As I take 4-5 second pulls, always have, and am going nowhere NEAR 45 Amps, the max I can go to is 25, and that is with a 0.1 build in power mode, 0.3 and above the voltage steps up so I am drawing around max 18 Amps.
So, I guess the Samsung 25R's are still the best out there, at the moment, and for the foreseeable future, until a company produces a true ultra high drain cell.
These batteries are fine for normal use though, but for when I want to push the device, a 25R works much better, much less sag, and I usually use the 150W for these kinds of wattages anyway. This is why I had not noticed before.
They are an OK battery, but not a GREAT battery, just a 20 amp cell. Don't know if it is a HG2 100% yet as only preliminary tests have been done, but it seems most likely, or they have made a battery with a VERY similar curve to the LG HG2.
I see nemesis vaper can vape all the way down to 8-10% with these LG HG2 batteries at 75W. I wonder if that is because it is dual batteries, or my LG HG2 should of been a B binned cell that got through.