My curves are made with a 6½ digit multimeter and I read the termination volt from them (From the curve, not from the logfile).
Termination voltage is highest voltage while current is on, as you can see on all my curves voltage drops immediately when current is turned off.
I’ve stoped using the all88 charger with lithium ion because if I check the voltage a day after charging the voltage is 4.13 –4.16 (the gyrfalcon isn’t consistent on all slots) but if I charge on mc3000 they read about 4.18 v a day or so after charge ( I set termination to 4.2v )
Hey HKJ ,Do these manufactures know you are going to publish your tests on forums
Is there a chance these are cherry picked for reviewers ?
Do you actually get mainstream production units ? I’ve noticed you sometimes don’t get the retail boxes
Maybe it’s the luck of the draw & some chargers of the same type are accurate & some not so!
Well anyway I’m very happy with my two mc3000’s ,my opus (after modifying) &my xtar vc4 they all terminate at a verified 4.2 ,the rest stay in their boxes.
When I say the charger is supplied by the charger manufacturer, like the Xtar, Eizfan, Golis chargers. When I buy the chargers or they are supplied from a shop the manufacturer will not know it.
Mostly no, I do sometimes get defective chargers for review.
Missing retail boxed is either early production units, from Ebay or from a reader.
The charge voltage will vary for copy to copy of a charger, how much depends on the quality of the parts used and if they do calibration.
Thanks HKJ that’s what I suspected :+1:
It seems to me that everything is very simple. If you want the voltage on the cell to be as close to 4.2 V as possible, choose a charger that is as low as possible with a cut off current and, as a result, a longer charging process.
For example:
MiBoxer C4-12 - cut off 60mA. 18650 taken out of the charger - 4.195V.
I think the C4-12 sometimes shows 0.06A and sometimes 0.05A (to verify) end-charge current before it indicates “Full”.
And you’re right, when I use a DMM to test the battery voltage (right after it becomes “Full”), then the battery voltage is really really close to 4.20v (oftentimes just +/- 0.005v from 4.20v, so like 4.195-4.205v)
What is now top 26650/18650 cells charger? My MC3000 died yesterday and now I think what to buy, 4 or more slots? And maybe what as spare 4 slot charger? Should I buy next mc3000 or s4 or something else?
I think the MC3000 is still one of the most advanced charger (if you like custom programming the charging currents or have a need to adjust the ending voltages, either for charging or discharging tests). Otherwise for charging only, I like the Miboxer C4-12 (although they seem to have a slightly high failure rate in some slot, at least per my experience).
Kajman, that is interesting. Mine has problems in the second slot and I am looking for an alternative, and the first charger I thought of was this exact same one. With display etc. Not sure "how good" it is though, compared to the MC3000. Shame on SkyRC when they break within 2 years. Mine was a 2018 model.
Mine died after 9 month, bought from China, so no warranty. First I got mcp3424 error, I changed chips, but keyboard had still no function, later magical things happened with display and it died. It seems,that it is middle quality, inside looks not much better than my old li500. And I never discharged cells with it, I use rc chargers for this purpose. Ehh, but if there is no other, I will buy mc3000, but locally with 2 years warranty 