You can’t trust the resistance reading then, most chargers aren’t an accurate measurement.
I have the same charger and can get 125 and others 35 using the same battery.
Button tops also raise the resistance, some more than others. Last year I purchased 120pcs Sofirn 18650’s to find the buttons could easily flick off with a knife. Very poor soldering job. The batteries are almost as good as a Sanyo NCR18650GA with the button removed.
They are a rewrapped cell because Sofirn is not a battery manufacturer. This does not mean it’s bad, though. It comes from a chinese battery manufacturer and generally speaking their chemical mixes tend to be slightly not as good as a company like Samsung.
The 40T is a top notch cell, but it’s usually more expensive than a chinese battery. The cheapest I’ve seen the 40T is about $7-$8 each plus shipping. If you paid noticable less than that, I would be suspicious if it’s a real 40T.
Can you add a picture of each cell? I didn’t know Sofirn sold a PLB cell. The common PLB cell most are familiar with is the 5750mah. Pictures might help to clear things up.
The Sofirn PLB 5000mah is this one, right?
The High Drain you tested was this one that says 25A on the label?
Even though the older PLB 5750mah (Shockli 5500mah, etc…) was better than this new one (higher continous amps 20 vs 10-15, plus higher capacity) this newer 5000mah is still beating the cells Sofirn uses in their HD version? Man, that’s high praise to PLB. I wish they hadn’t discontinued the older, better cell.
I was rather disappointed the older cell had been discontinued as I had placed a bulk order from my supplier. I had to then change to these PLB 5000mAh but I’m not disappointed.
Okay, I ran another discharge test at 15A and the temp reached 62 degrees Celsius. Slightly exceeding the max of 60. I reckon 14A continuous would be fine
I wonder what the ideal room temp is meant to be for an accurate test. Room temp tonight is 20C.
I’m not sure what’s up with this cell on capacity as almost every discharge shows a different result. Then again my charger hasn’t got a reliable cut off, sometimes 4.20v and others up to 4.25v.
This test at 15A got just over 5400mAh and battery was 4.23v
i have similar findings with their 18650, all measured just a tad over the rated 3000, but their 26650, which is supposedly PLB re-wrapped, rated at 5500, one of them measured at 5480, which is close enough ill let it slide, but the other is 5331, a bit disappointed with that. the no brand 26650 that came with my ft03 was over 5500, but it was only rated 5000
Like Funtastic said, without a data sheet its risky. You can try as long as your willing to monitor the temperatures to make sure they don’t get too hot. I would feel more comfortable at 1A to 1.5A.
Surely you are not referring to the PLB 5500mah cells relabeled by Shockli, etc… No one has ever said they are related. They are definitely not related. They use a local Chinese made cell. Some measure closer to 5000 and some closer to 5500 and they separate them into two groups and label them appropriately. They are quite generic and nothing special.
The PLB 5500mah on the other had is a top quality cell. One of the best in its capacity.