low temperature NiMH ?
low temperature cost NiMH ! 
I remember it’s been mentioned and requested before, but have the PKCell IMR18350 700mAh and PKCell ICR18350 900mAh been reviewed by HKJ here yet?
Reason for asking, is I’m trying to decide whice one suitable for flashlights.
When I tested discharging both at 0.25A, I’m getting very similar mAh values (I followed the manufacturer specs, drain IMR18350 up to cut-off voltage 2.75v, whereas I drained the ICR18350 only up to cut-off 3.00v; then I get around 850-900mAh for both types.)
I didn’t test higher drain rate yet. The ICR18350 is up to 2C (1.8A), whereas the IMR18350 is rated for 10C (7.0A).
Let says, I put them in a shorty tube Convoy S2+ (7135x6 = 2.1A highest mode), will it be bad for the ICR18350 (rated 1.8A)? What does “bad” mean — it shortens the life cycle or it might overheat/explode or something like that? Would it have shorter runtime than using an IMR18350? Because, while the S2+ (7135x6) will drain at 2.1A at highest mode, I wouldn’t be using the highest mode all the time anyway, so the rated 900mAh runtime may be better than the 700mAh IMR18350? (granted, I tested both ICR18350 and IMR18350 to have similar ~ 850-900mAh at low drain rates => similar expected runtime when flashlight at low mode)
Also, is it unsafe to use the ICR18350 (1.8A max discharge) for direct-drive flashlights like Astrolux S1 or Astrolux S41S, since these can drain at higher amps?
Panasonic low temperature cell: NCR18650F
Data sheet: https://na.industrial.panasonic.com/sites/default/pidsa/files/ncr18650f.pdf
https://www.fasttech.com/product/5326002-authentic-panasonic-ncr18650f-3-7v-2900mah
I already have an order on them, but it will be some time before I have time to test them.
How about Sony VTC6A?
I will also test them, but I do not know when.
Fenix ARB-L16-700 with built-in micro USB charging circuit.
How about Soshine 5500 mAh?
Samsung ICR18650-32A @ FastTech
Highest capacity “high voltage” Samsung 18650 cell. Already in the market for a long time, it got my attention quite recently because my brother asked me about restoring his Lenovo ThinkPad “73+” battery, a 3S2P pack which comes rated at 5.6Ah and 11.25V. FastTech claims close to 2.9Ah of measured capacity with the usual 4.2 volts, this is just a smidge hard for me to believe. 
Cheers :-)
The Kraftmax hybriX pro (KM-4HDDW) could be probably labeled Fujitsu HR-4UTC:
But they are labeled “Made in China”, so a review could clear the quality.
In this review they are shortly befind the Panasonic eneloop BK-4MCCE/4BE.
Pkcell 10440 are known to be good…an now I’ve seen they have 1300 mAh AAA. It would be nice to see what are they worth.
“1300mAh” AAA PKCELLs? Smells like an incoming deception, but reviews will tell. Also, a hard sell if non-LSD in my opinion.
Cheers my dears 
I checked ebay for PKCells and has ordered:
AA 1300mAh
AA 2200mAh
AA 2600mAh
AAA 600mAh
AAA 850mAh
AAA 1000mAh
10440 350mAh
18350 900mAh
I take it a bit easy with larger LiIon cells, my queue is many months long.
Yeah, we’ll see.
I ordered some 1200 (needed cheap AAA anyway). If Zanflare C4 can measure them I’ll report the result.
I’m not sure if its been mention or if it easy to get. What about the Precision Design AA 2900 mAh?
I can see these batteries are fairly easy to get in the US, but that do not help me.
Just wanted to say I really appreciate your reviews. Just wondering if you have any interest in testing out smaller 10180 batteries? I’m interested to see the discharge graph of the klarus 10180 INR cells (particular in comparison to standard li-ion 10180). Can be purchased: Klarus 10180 Rechargeable Li-ion Battery . But also comes with the klarus 10180 flashlight, if you have trouble finding the cell by itself.
I am interested in testing small batteries. I requires a bit preparation first, but not that much.
US is not the best place for me to order batteries, there is usual shipping problems.
I love 10180 lights and I’d love to see some test of 10180 batteries.
At the same time I see how your queue is very long already and I have mixed feelings…