I remember having suggested the Samsung ICR18650-32A in the past here (#384) and there (#465), guess it was forgotten and/or something went wrong… :???:
How about the above LiFePO4 cells? Heter is a quality cell manufacturer, but I have seen next to no reviews of its cells.
Good question with the 32A, I have tested them long time ago, but did not publish it when I found out it was at the wrong voltage (4.2V charge, they are only about 2700mAh at the voltage).
I have some cheap LiFePO4 in queue and I may also look at your last suggestion, but 20S is not in stock.
The following is a few suggestions from a seller in AliExpress who is rewrapping some kind of chinese/korean OEM cells or whatever. Noticed the ukrainians behind the video in the thread “Testing 18650 Safety - Russian Style” were using EAIEP 26F pink wrapped cells, cells which totally look and seem to behave like some fake 25R cells I got months ago. Decent and cheap stuff:
Mmm, none of those EAIEP offerings look appealing?
We can be glad we can buy lots of first OEM batteries in their original industrial wraps, which is because brave retailers manage to get and market them. However, due to the li-ion battery OEM to consumer sales reluctance/reticence I do not see an easy way to buy non-first OEM (LG, Murata, Panasonic, Samsung) cells except with a non-OEM wrap.
China is still a bit of an isolated land with certain good OEMs and products. Since the unit price of these cells is super affordable they could be top candidates for a large battery pack, of course for as long as their performance and consistency are decent at the very least. The aforementioned ukrainians were building e-bicycle battery packs with them.
May we know which ones? A little birdie told me the wide triple leg pink wrapped “26F” cells come from BAK. I may delve in a more detailed identification if I can find some chinese indigenous lad willing to cooperate.
LoL thanks. I'd have likely chosen the same models. Both 33E and VTC7 seem to use the same cell underneath and I wonder if they could be rewrapped LG MJ1 cells. With respect to the penta-leg top 25Rs, no idea.
That cell is likely to use one of the top OEM available high capacity cells, maybe an LG M36.
I believe there are no alternatives of equivalent quality.
It seems that most of usb-rechargeable 18700 cells use 18650B or similar cells, low discharge and OK capacity.
Klarus has used 18650GA in their cells before in their “3600” cells and I expect that’s what’s inside this one; better at both discharge and capacity than others. Though yes, it may come with a M36 or something similar.
Aside from a better cell this might have a lower-resistance protection circuit as well.
sharply curved or having an angle.
“a piece of bent wire”
synonyms: twisted, crooked, warped, contorted, deformed, misshapen, out of shape, irregular
2.
INFORMAL•BRITISH dishonest; corrupt.
There's the “BD” and the “BE”, and now this “BM”. All I can say is the capacity figures that guy in the video gets, even if at 0.25A discharge rate, are rather beefy.
You forget the BF and BL too, lol, it’s really unclear their name, it seems to me that the BE and BL are 7-amp cells, the BF meanwhile gives 4.9 amps it seems to me?
BE - 1. generation of Tesla Model S 85 cells with carbon anode (unconfirmed)
BM - 2. generation of Tesla Model S 85 cells with C-SiO anode (parameters confirmed by direct comparison with Tesla 85 cells (MY2016) and many cycle life tests in my lab)
BD - is BE or BM technlogy based cell without bottom vent (unconfirmed)
BF and BL cells are based on other technology, I think BF and BL both are C-SiO anode succesors produced by Sanyo of an old Panasonic NCR18650B. (unconfirmed)
Only a guess that it is the evolution/modification of the same 2900mAh technology. I have personal experiences only with PF cell which is an old fashion Panasonic low DCIR cell with great cycle life. (PF has lower DCIR than BM and slightly better cycle life, but it is also slightly more expensive USD/kWh). PD seems to me as PF with bottom vent. I heard about PE for the first time from you.