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.
Since people is reporting low IR values (20 - 30ish mΩ), sag complaints are unlikely to arise.
Seem to be awesome cells, yet I'll refrain from ringing the bells too early, at least until I can see some properly obtained IR figures, HKJ or other reputable techie test them, and or I can make some tests on them (not soon).
Received the first two batteries and Lii-500 charger today and have them on the charger running a nor test at 1A.
IR for cell 1 is 23 and cell 2 is 21 during the charge and discharge phases. Cell 1 5011mAh and cell 2 5098mAh. Since the Lii-500 terminates discharge at 2.8v but typically cell specs state 2.5v the actual capacity is well above the listed 5000mAh.
I decided to order two more yesterday and using my points again the total for all four cells I’ve ordered from gearbest was $20.50 including tracking.
My second order was “scanned by X ray and returned”….well… i do hope at least GB one to arrive, it seems that declaring those as kitchen goods dont work always .
I also received a pair from gearbest. For 10$ it is a steal!
Both cells measure 5600mAh in my charger and power a FET driven XHP70 light with 8A at start!
Better then my keeppower 5200 cells!
My first 4 is in from Aliexpress, and the result on Opus 2.2 is around 5200mAh on each. So very good. Do see that others gets even higher numbers, but I did only do one test @1A