Test of Samsung ICR18650-30A (by Barkuti) (simple; in progress)

Barkuti · 2019-02-23T01:30:43.000Z

Made a few photographs, took the opportunity to test some manual color temperature adjustments since the automatic setting in my smartphone feels Kermity to me:

Daylight white balance for the above picture.

The above crop and mix picture was taken with manual white balance set to 4800K, which more or less is the temperature of the illuminant lamp. Cell wraps definitively look too purple here.

Which one of the above pictures, CCT wise, look better to you? Next time will do with the same shot, promised. O:-)

Right now cells are undergoing a standard Lii-500 NOR test at 1A/0.5A charge/discharge ratios. Will extrapolate the capacity test results with those of his older sister Samsung ICR18650-28A (≈91.559% of its 4.3V_max capacity at 4.2V).

Will too DC internal resistance test them, although as you may expect it won't break any records here.

Hope it does proportionally better than the 28A.

Update nº 1.-

Slots 1 & 4 1A/0.5A NOR test round 1:

2523 and 2551mAh for cells 1 and 2.

Startup IR readings for second round improved somewhat.

Update nº 2.-

Slots 2 & 3 1A/0.5A NOR test round 2:

2577 and 2562mAh, cells 1 and 2.

Update nº 3.-

Slots 1 & 4 1A/0.5A NOR test round 3, done ≈3 days later:

2505 and 2548mAh, cells 1 and 2.

Looks like slot 1 in my Lii-500 measures a little bit low :???: maybe.

2535mAh and ≈2553.67 cell 1 & 2 averages, 2544.34mAh average total.

Update nº 4.-

Slots 2 & 3 1A/0.5A NOR test round 4, done March 9th. Cells were precharged exactly to 4.3V:

2822 and 2790mAh for cells 1 and 2, 2806mAh average. Just checked the datasheet, same story as with 28A cells, overstated capacity. Like 28A/30B/etc cells high output voltage and flat discharge curve observed even if no graph available.

Cheers ^:)

Barkuti · 2019-03-09T09:14:53.000Z

Update added. Will report here subsequently.

2nd update added.

3rd update added.

4rd update added.

Sat, 02/23/2019 - 08:44. Sat, 02/23/2019 - 17:35. Wed, 02/27/2019 - 10:42.

vapcell_Dennis · 2019-03-08T01:50:59.000Z

great

LII-500 can not full charge to 4.35V，maybe try LII-202 will be good

BlueSwordM · 2019-03-08T02:02:16.000Z

Because some lithium ion cells like the Samsung 30A are designed to charge to 4,30V, and the LG D1 can charge to 4,35V safely.

vapcell_Dennis · 2019-03-08T02:08:45.000Z

Most li-ion batteries have a full voltage of 4.2V, but a few have a full voltage of 4.3-4.35V.

However, only 4.35V chargers are installed in 18650 chargers on the market, and 4.3V chargers are seldom seen. This requires professional charging equipment to complete.

Barkuti · 2019-03-08T02:25:55.000Z

Aaah Vapcell Dennis! Yes that is right. I also have a Lii-202 and a precision power supply, thought the Lii-500 wouldn't have trouble starting the discharge from a higher voltage in the cells but since I could reference Henrik's quite old Samsung ICR18650-30B cell test, I didn't care.

Will give'em a go at 4.3 - 4.35V.
Right now testing some cheap “1000mAh” 18350s in my Lii-500, they're clocking at ≈900mAh and we'll see how they do concerning DC internal resistance. I am not exactly happy with label exaggerating tendencies so I am going to make myself heard to the AE case management team to ask for a bit of a partial refund depending on the latter score, I think this is a fair way to ask sellers and rewrapping companies for honesty.

Cheers ^:)

vapcell_Dennis · 2019-03-08T03:54:51.000Z

Barkuti:

Aaah Vapcell Dennis! Yes that is right. I also have a Lii-202 and a precision power supply, thought the Lii-500 wouldn’t have trouble starting the discharge from a higher voltage in the cells but since I could reference Henrik’s quite old Samsung ICR18650-30B cell test, I didn’t care.

Will give’em a go at 4.3 - 4.35V.
Right now testing some cheap “1000mAh” 18350s in my Lii-500, they’re clocking at ≈900mAh and we’ll see how they do concerning DC internal resistance. I am not exactly happy with label exaggerating tendencies so I am going to make myself heard to the AE case management team to ask for a bit of a partial refund depending on the latter score, I think this is a fair way to ask sellers and rewrapping companies for honesty.

Cheers :partying_face:

You know so many batteries. You are a battery expert. You need buy some better charging and discharging equipment. These devices are not very expensive. :sunglasses: