I am performing another charge/discharge test just to see if there is any difference in capacity after a second charge & will post the results later today.
Second charge/discharge cycle finished.
Cell 1, IR during discharge 23, capacity 5114
Cell 2. IR during discharge 18, capacity 5190
So fractionally better than the first test results but still within a few ma”s & the cells seem pretty well matched
Now, if those IR values are to be believed, that would mean these cells should handle a continuous 20A discharge rate with ease (within a ≈10W thermal envelope).
Darn, I only bought one to play with a week ago. Any left? I know GB will say they have them when in fact they don't. Well, against my better judgement I went ahead and ordered 4 more. I don't expect to see them in any less than 60 days, maybe longer.
I have another pair coming from another supplier so we will see how they test compared to my first 2.
Might show if there is continuity with these cells
My other pair of cells from the other supplier have just arrived
Checked the voltage & both showed 3.79v, exactly the same as the first pair :+1:
I have just started a charge cycle & will report back with charge & discharge results when finished
Just received 4 pcs of Liitokala 26650 yesterday. Voltage around 3.82 V.
I will do capacity tests on 2 of them in the next days. Tests will be on 1A, 3A and 5A. 7A test is possible on request.
They are full flat tops. Can`t use them in series. I have 4 from GB and they came in good condition at each 3,82 Volts. My discharge test on opus-bt at 1Ah shows 5445mAh, 5367mAh, 5289mAh and 5398mAh in the first cycle. Internal resistance test with opus-bt all four under 30.
To me, what you said there just does not make sense at all. I am to get a couple of batteries for an XHP70 custom build, powered by a buck driver I am going to optimize. As I see it, a couple of these seems wonderfully adequate: at 4'8A maximum driving current, the Vdrop caused by an in-series couple of these will always be, at most, 0'3V, which allows the driver I am going to use (unmodded) to stay in regulation down to 7'2V or about 7'5V no load; my “optimizations” (much bigger & very low ESR inductor) should allow me to enjoy a driver overhead reduction of around 0'2V.
Results are in from my second pair of Liitokala 26650”s
Cell 1, IR during charge 20, IR during discharge 21, capacity 5104 ma
Cell 2, IR during charge 17, IR during discharge 19, capacity 5211 ma
Good figures all round again & well matched, very very close to my first pair
First pair were from Aliexpress & second pair were from GearBest.