It is really amusing to watch the amount of effort and money some of you spend to gain a prawn's hair difference in a measurement. Are you going to some kind of competition to see who among you got it bigger?
It’s part of the hobby to push everything to the limits where possible. Just like people modifying cars trying to squeeze every last bit of horsepower or shave every last ounce of weight.
Thanks Dennis. Thats what I thought, a LG cell designated for a tool company. Just like the (yellow) LG HE4 was for Bosch cordless tools, with identical performance to the (red) HE2, except that it was supposed to be able to handle heat a little better
So LG HG2L samples from Nkon arrived today. One major difference which I think was not mentioned earlier is that HG2L have bottom vent. I already started some initial tests with older (but not used) HG2 sample running on the next channel of my battery tester. I hope I will post the results this weekend.
Ah ok. Interesting article. It’s a weakened area on the bottom. Not the primary vent, but if the cell were to build enough pressure to explode, it would separate at that disk instead of splitting the sides. Always wondered what that ring was for I’ve seen on various cells.
But seriously, nothing new, the only data / value that changes in this datasheet compared to that of Brown HG2 is the Voltage Cut-Off operation, it goes from 2.50 Volts to 2.00 Volts, which explains and confirms the rumors and the reports of the sites which indicated a better management of the current during important sag of voltage.
After initial tests I can say that there is no significant difference. In fact older “brown” LG Chem HG2 cell sample, manufactured in Dec 2016 seems to be slightly better. I added one sample of HG2L to my cycle life test, but it will take some time to get results.
LG HG2:
nominal capacity: 2.893 mAh
nominal energy: 10.603 Wh
“10s DCIR” at 50% DoD: 27.58 mOhm
LG HG2L:
nominal capacity: 2.852 mAh
nominal energy: 10.422 Wh
“10s DCIR” at 50% DoD: 29.85 mOhm
I am using for DCIR measurement dedicated high-tech battery testers as well as some low-cost testers with proper calibration. But I think more important is to use always the same testing method, because 10 methods = 10 different results. I am a fan of a method which I personally called “10s DCIR”. The main benefit of this method is the ease of implementation, which is very straightforward and can be performed with low-cost equipment or battery testers. So I am not looking for some magic method, but for direct cell comparison under the same conditions.
If you are interested in competitor cells under the same 10s DCIR test:
By the way, a couple days ago I bought a couple EAIEP 26F cells and submitted them to Henrik. Those are the cells used by the KREOSAN Ukrainian fellows (made by Heter):