465 units ordered as of this posting…. 
Not much away from 500…
great!
Okay, after receiving it a couple of days ago, today I did some more testing.
Just now I discharged 4 18650’s at 1A
The discharge capacity shows higher than the rated capacity, this could be possible and I will confirm this with a discharge on my accucel-6 later.
But for some reason, one of the batteries, in slot 2, suddenly shows as if it was never discharged. Time is 0, capacity is 0.
Really strange, and I don’t know why. When I checked 20 or 30 minutes ago it was just discharging normally like the rest with a similar discharge capacity as the rest
I’m now doing a 700mAh charge (due to the charger only being 3A, I hope this will give better results than 1A since it won’t be able to deliver 4x1A)
Let’s see how it goes.
Yea, I had some of those issues too. The timer never starts, or plays up like that.
Well, the capacity it put in the batteries while charging is less than the number it showed when discharging.
Maybe the discharge function suffers from the same issue as charging with more than what the power supply can deliver?
Charge/Discharge indicated capacity comparison between stock 3A P/S vs 15A cheese grater style P/S. Cells are new but vintage Samsungs laptop pulls with capacity of 2405mAh (4.2v) @ 1A
Cells were cycled fully three times prior to collecting data and remained mostly unmolested in their respective slots. After each charge/discharge cycle, the P/S were exchanged then cycle repeated.
| 15A P/S |
| Charge/Dischrg Charge/Dischrg Charge/Dischrg Charge/Dischrg |
| Current 1A / 1A 700mA / 1A 500mA / 1A 200mA/200mA |
| Cell #1 2478 / 2497 2420 / 2505 2463 / 2506 2488 / 2361 |
| Cell #2 2443 / 2514 2372 / 2522 2392 / 2506 2442 / 2389 |
| Cell #3 2474 / 2497 2412 / 2505 2449 / 2489 2480 / 2349 |
| Cell #4 2468 / 2497 2408 / 2505 2463 / 2490 2484 / 2379 |
| 3A P/S Stock |
| Charge/Dischrg Charge/Dischrg Charge/Dischrg Charge/Dischrg |
| Current 1A / 1A 700mA / 1A 500mA / 1A 200mA/200mA |
| Cell #1 2703 / 2471 2658 / 2507 2442 / 2489 2494 / 2353 |
| Cell #2 2657 / 2488 2596 / 2523 2445 / 2489 2437 / 2372 |
| Cell #3 2649 / 2455 2610 / 2490 2507 / 2489 2469 / 2332 |
| Cell #4 2734 / 2455 2654 / 2507 2481 / 2473 2478 / 2364 |
Hmm, doesn’t really seem that much of a difference between discharge with different psu’s
I discharged the first cell on my accucel with 1A
it got 2714 on the opus and 2544 on the accucel. Accucel was set to discharge to 2.8V. But in past tests I noticed the accucel shows a lower voltage so right now I’m doing a second discharge on another cell discharging it to 2.7V
I’m also doing another discharge on the opus with 2 cells 1A right now. Let’s see if that makes a difference.
Well, they both started at the same time.
After 2.5 hours the accucel is done with a result of 2541mAh. These are 2600mAh rated batteries.
The opus is still discharging and measured a battery voltage of 3.4V at the same time the accucel announced it’s stop.
Both did a 1A load.
Either the accucel really measures a way to low voltage, or the opus measures a way to high voltage or just does not discharges with a real 1A load but does use this for calculations. And although my accucel does measure a bit lower, it’s only 0.1V difference with my multimeter, not a 0.7V difference as it is with the opus at the same load.
Seeing that the capacity I got with charging was around 26something and the accucel is as I’m typing this at 2700, I am almost sure my opus does not discharge correctly with 1A, even with only 2 batteries inserted.
I’ll see if I can do a 0.5A discharge tomorrow to see if the results come closer to reality.
Will also try to test if I can test other batteries. But it might not be until after the weekend.
And seeing that most problems with wrong capacity I’ve read about where with showing a higher charged capacity and a normal discharged capacity, I’m not that happy :~
I could live with a wrong charge capacity, but the discharge values should be correct 
edit: the opus just stopped discharging when I finished typing this.
2 hour 42 minutes 2700mAh
2 hour 45 minutes 2744mAh
On the accucel I got 2 hour 32 minutes 2541mAh
The batteries are all from the same batch
474 units
I ordered the deal at Gearbest 6/18. As of this moment, I have no shipment notice. I am not real amused.
Are we waiting for a V2.1 or V3? There continue to be reported problems with V2.
Please post your order number. CS of GB will take care of that today.
I was editing as you posted. I would like some idea if there is going to be a version change. If there is, I will wait.
Just like in almost all products in the market, a version change for improvements is always a possibility. This is a very much more complex product as compared to just a straight-up charger, let’s just hope it’s gonna be sooner or perhaps later.
I phrased that badly. Is the delay in shipping related to a version change or simply poor processing?
What is your order number?
I would really appreciate an answer to my question. I was reluctant to order this because of the number of reported problems in V2. Those reports continue to grow.
Your question has been answered. The item being offered is not v3. v3 does not exist (maybe it will one day, maybe it never will), there is only v1 and v2 in existence. On offer is v2. I would think that if there is a delay, its due to the demand. One seller, not the maker, has sold nearly 500 units. One would assume they dont keep an endless supply of them.
I am quite sure there will be a version upgrade, as that is the only natural direction of product evolution.
Regarding the problems with this , what it boils down to is that this is basically a toy. A pretty cool toy. But probably not made that well. I have two 16340s that won’t do anything in opus. The fan is not sturdy and you can press it and move it. Mine looks like it is covered with tape. It is showing plus 800 capacity for my 14500s. So I think they’re Sanyo under there. My TF flame 14500 showed about 800 and I thought it was gonna be fake. I bought another opus and I really don’t need it.
I guess you are right.
Maybe I was expecting more than I should.
My accucel isn’t top of the line either so those results might also be off. I was comparing those 2 results against each other.
So far the opus is consistent with it’s discharge readings, so it can be used to determine degradation of cells and comparing cells to each other as long as they are all tested in the opus. I do think my accucels readings are more accurate so for more important tests I will probably use that for datapoints.
I will still do a 0.5A test to see what that does with the capacity, and will also discharge some eneloops on the opus and my maha c9000 to see how those results compare.