Nominal capacity: 7000 mAh
Nominal CDR: 3C, 21A
Weight: 96g
ACIR: 17.7 mOhm
Capacity from 3 amps discharge test (ToolkitRC M8P):
@3.0V: 6.42 Ah
@2.8V: 6.83 Ah
@2.6V: 7.04 Ah
Bougth it from AE
Far less cheap than King 4000, but with discounts I managed to get it for smaller price than NKON’s Keeppower 26650 7000mAh (and with free shipping).
I’ve also bought a Lii-70S a while back from AE. Normally I don’t buy 26650, since I have only a couple of lights that use that size and I prefer to run 21700’s (with an adapter) in them.
Because I was curious about this cell (and it’s actual capacity) and I could stack a couple of coupons to get the price down to € 5,73 (incl. shipping), I’ve ordered a single one.
I haven’t had time to do capacity/discharge checks, but good to see your test results, thanks!
LiitoKala is a bit confusing on their website, since they basicly list a ‘voltage cut off’ of both 2,5V and 2,75V for the Lii-70S. Taking the 2,75V termination voltage as being the ‘correct one’, your result at 2,8V is pretty close to its rated capacity. There is a good chance that with a lower discharge current (0.2C/1,4A), it should pretty much hit it’s listed capacity at 2,75/2,8V.
So yeah, it appears to be pretty decent in that way!
By the way: I did test/measure, my cells ACIR and it came pretty close to what you measured on yours, with mine being 17,98 mOhm. Still within LiitoKala’s specs of ‘<18 mOhm’, but pretty close to the “max ACIR” it should stay within.
I finally had time to do a first discharge test of my single Lii-70S, which has been (unused) in storage since recieving it.
I had charged it up and let it rest for 30-45 minutes and measured 4.201V on my DMM at the start of the test. I applied a 0.2C discharge current (which comes down to 1400mAh), because that is (most) common for manufacturers when capacity testing/rating their cells. (Liitokala doesn’t specify that on their website.)
I set the cutoff voltage at 2,7V, although Liitokala gives contradicting values on their website.
Testing was done on my Atorch DL24:
In the end I’m slightly confused/dissapoint by the low capacity that was measured:
6757mAh is well below what @Qubeet measured at 2,8V and also too far off from its rated capacity. I will repeat the test in the near future, to see if I made a mistake or that I just might have a bad sample. (In the end, I only have a sample size of 1, so not the most scientific approach.)
I also recieved a different electronic load a couple of days ago, which I might also run a test on, but I’m waiting on a new battery holder that I want to use with it.
(For people who are curious: it’s being sold on Aliexpress as the MDL 150 electronic load. I will probably create a new topic for it, when I have some experience with it.)
For now I will first focus on testing my 4 Liitokala King 4000 batteries. If those give consistent and close results (for their rated capicity), that might also give an indication if my testing setup was/is off or that my single Lii-70S might be an underperforming sample.