I’m pretty sure that high drain + protected is not possible, unfortunately, it’s one or the other. Others will be able to go into more detail but I’m quite sure the protection boards prevent cells from being ‘high drain’ cells.
if you do want some good protected cells tho keeppower make good ones.
fneuf, cell model numbers are not chemistry recipes and neither normalized ratings. The actual chemistry of most modern quality cells I believe is likely either Lithium Nickel Cobalt Aluminum Oxide (“NCA”, LiNiCoAlO2) or Lithium Nickel Manganese Cobalt Oxide (“NMC”, LiNixMnyCozO2). Source: Lithium-ion battery @ Wikipedia, the free encyclopedia
Protected batteries usually are not high drain types mostly because protective circuitry with enough MOSFETs to handle all of the current simply doesn't fits in the limited available space of a tiny board.
Protection boards add in series resistance to cells, this lowers energy output (voltage and capacity). A typical DW01A plus dual 8205A MOSFET protection board probably adds ≈15mΩ of burden resistance. They also consume power to feed the protection circuitry, something which eventually ends up discharging the cells and self-tripping the over-discharge protection.
Li-ion technology wasn't mean for careless and uninformed end users. Proper user education is always the best approach.
Thanks for this thorough and well wrote piece of information. You are right.
That said I never planned to offer it without educating the "gifted". But I sure also would like to minimize any risks. It's kind of doubling the security measures, too much is never too much. I'm trying to find the hazardless setup to fuel this L6 light. If I rephrase, my need would be "What is the safest way to store 6 to 8.4v in a 2x26650 space?". And at that point, without any magical AAAs to 26650 adapters appearing somewhere (with also really strong hopes that sag would not kill them), the safest energy option seem to be KP 5200 protected cells.
User measurement inconsistencies all over the place, at times in a wild way. Honestly, one would not expect this from a reputable cell manufacturer (Power Long Battery), so something fishy is going on behind the curtains. This could be because of rogue merchant dealing with and selling factory rejects, or who knows what other trickery.
The one I posted is linked directly from Littokala’s website.
I ordered 4 of the new blue 5100mAh 26650s about a week ago. When they get here, I will check-test the capacity and internal resistance with my chargers.
No fakeness to be proved there. Their cells have been tested by Henrik here and there, delivering consistent capacity above 5Ah in any case even at 1C rate as per official PLB specs (a Lii-500 discharges at 250/500mA, which at most is 0.1C). God knows what they're doing those AE merchants besides deceiving and dissapointing customers.
Of course I do not mean to say all AliExpress sellers do the same, but the way AE works seems to be fertile ground for crooked sellers. In my opinion the whole LiitoKala battery rewrapping division smells like a nice fart. :-D