A BATTERY MOOCH POST: Golisi S30 Black 35A 3000mAh 18650…overrated but they’re rewrapping

This cell claims a 35A continuous current rating and 3000mAh capacity. These are both exaggerated but Golisi has agreed to rewrap these cells with a 25A rating before March 2018.

While I was quite disappointed to see the exaggerated ratings I am glad they say they will be rewrapping these cells with more realistic ratings. At its claimed 35A continuous rating it delivered less than 100mAh down to 3.2V. At a 0.5A discharge it only delivered 2846mAh.

This appears to be a China-manufactured cell as it doesn’t match any Samsung, Sony, LG, or Panasonic/Sanyo that I have. Golisi’s discharge graph shows a cell with much better performance than the four I tested. I had a couple of discussions with Golisi about the differences between the factory’s test results and mine but we weren’t able to resolve anything. I am unable to explain the discrepancy.

The four cells I tested showed the typical variance in capacity and internal resistance for China-manufactured cells. I don’t think these cell-to-cell differences are noticeable when vaping though.

Golisi has compared this cell’s performance to the 20A 2500mAh LG HE2 in a Facebook post. Its voltage while running and capacity are a bit worse than the HE2 down to 3.2V but the Golisi does run a few degrees-C cooler.

I estimate this Golisi’s ratings to be 22A and 2800mAh.

DC Internal Resistance = 22.2mOhms (milliohms) average for the four cells.

Total energy delivered down to 3.2V at 10A continuous = 6.44Wh (Watt-hours) average

Total energy delivered down to 3.2V at 20A continuous = 3.64Wh (Watt-hours) average

Four cells were donated for the purposes of testing by Golisi (www.golisi.com). Thank you!

Ratings graphic: https://imgur.com/a/IKjDL

Test results: https://www.e-cigarette-forum.com/threads/bench-test-results-golisi-s30-black-35a-3000mah-18650…overrated-but-they’re-rewrapping.844883/

These tests only note the estimated ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, LG, Panasonic, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” batteries or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.

Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of personal injury or property damage. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition.

To see how other cells have tested check out this link: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

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