Difference between Opus BT-C3400 & BT-C3100 v2.1?

Some questions/concerns assuming Jon will let me keep my Opus and test it with a new power supply AND Return it for a new one if it fails!

What will the quality be for a Power supply that was shipped for $6.99?!

Will it meet the advertised specs of 12V/5A or will it fall into the category of so many falsified capacities/specs. of numerous Chinese batteries?*Fire, ect.

No way for me to know until I get it because I have no equipment to test it!

This is just a guess! It is sold for $6.99,probably cost $1 to make, ebay guy buys it for $2 and pays $2 or$3 to ship to me and gets a $2 or $3 profit!!! :laughing:

Thanks gauss, that is kinda what I figured…… :frowning:

Well, look at it this way, unless it blows up, burns up, or shocks you…. it can’t be any worse than the one you have now and you not notice it. :smiley:

Successfully charged 3 X NCR 18650 @ 1AMP.

DMM Measured: In @ 3.80v, Out @ 4.17v

@ wolfdog
Did you just Charge… or did you do Charge - Discharge - Charge?

See even though I brought this issue to light. I’ve never had it happen on a charge discharge test. Only a regular charge. And usually when cells are complelty done for not only half completed. And not everytime just occasionally.

To me its not heat related. I literally have a window ac unit maybe 2.5feet from it blowing directly on it. Shares the same plug with the unit. There’s no way within 3-4 mins it could overheat with 60degree air blowing across it. A good bit of the time the fan won’t even come on. Or cycles briefly with 6000btu air-conditioning blowing right on it

Edit
I’ve done hundreds of charge discharge test 4 at a time at 1amp. Just did 68 last weekend not a issue. (3day weekend for me) ran non stop literally
What made me notice it me and the wife have 3 tomo v8 powerbanls. They charge uber slow. So we change out the batteries. The batteries are at 3-3.2 volts when being charged. And I’ve seen the problem only at the most power draw of a charge cycle. Once the batteries get 3.7-3.8 the power loading shouldn’t be as hard

I just charged them per “Chops” suggestion to see if the charger worked.

He probably asked me because the “Failures” happen when transitioning from Discharge to charge.

That is when the battery is ~ 2.80V and “May” need the most energy to get the charge started? Hence, the thought process that it probably needs more powerful Power Supply.

All this “detective work” is kinda fun. :wink:
Our chargers have the exact same issues. I am gonna hitch my cart to our power supply being the problem theory (inadequate supply for occasional demand in certain instances) … (Thanks HKJ…. :wink: . )
It will be interesting to see how it all plays out. :wink:

^

I ordered my Power supplies[Two]! ,and I hope it is the solution because I like my capacity test results and a 0.03v additional charge compared to my original Opus!

I hope it is too……… :+1:

If the Power supply I ordered is as efficient and impressive as the Ebay dealer and USPS, I will be very happy!

I ordered it Friday night. It is coming from Oregon and I live in Pennsylvania[Subs. of Philly]. It is “OUT FOR DELIVERY”!

The USPS gets ripped a lot…I have done my share. I will give them credit for this. They may NOT deliver on Sundays but the packages are still moving!

I am going to do several “Charge/Tests which is where it failed. That was minute or Two into The charge phase AFTER discharge was complete.

I will report back possibly tonight and hopefully w/ all good news!

For some reason Items I purchase from Washington/Oregon area get to me faster than from anywhere else
I forgot to mention the other night—I usually charge my cells first —let them rest—then I do a charge test—the charger tops them off first before the discharge as normal—I don’t like charging for 2 hours then discharging for another 2 + hours and again charging for 2+ more hours—seems abusive to me

That is good info then, as it is a totally different scenario than what Wolddog is describing. And my charger does the exact same thing his does.

Even California[Illumns] will get here in 2 days for First class mail!

I agree, that is exactly what I did as I wait for delivery. Otherwise the CHARGE/TEST can take 8 to 10 hours!

The only time I don’t do that is for a First time capacity test with new batteries where I let the Opus do the whole cycle. The New batteries are usually ~ 3.60 when I get them.

I could be wrong, but I think you are somewhat misunderstanding what Chops is saying. Maybe a little more abuse, but I take it as time saving.

MINE FAILED when I put the batteries in at a mostly charged state and then the Opus discharged, then tried to charge them @ 1amp but reset instead!

INSTEAD of Charging/discharging and charging for the CHARGE/TEST. It save s time if the batteries are mostly charged or at rest after charging then put them in for Charge/Test. that way you save ~ 3 hours.

The Opus is still discharging and charging so you can get the capacity. My failures have been shortly after discharge when the batteries are @ 2.80v and they begin charging again.I believe the INITIAL charge has nothing to do with failure shortly after the battery is discharged.

Again, where mine failed is what HKJ talked about where the charger spikes in output because it needs that surge of energy when the batteries are ALL @ 2.80v. I think he said it jumps to ~ 6 amps for 0.03 of a second!! He elaborated on that last Friday. :slight_smile:

EDIT: Besides ALL of that the Opus should be able to do ALL Three stages without an issue!

Jon from Liionwholesale who sold it to me has about 5 of them running constantly doing capacity tests!

OK, I did misunderstand how you were doing it. I thought you were letting the OPUS do the whole thing…… CHARGING almost empty cells - then DISCHARGING for Capacity - then going back into CHARGE Mode

My bad, I’ve got it now. You and chops728 are on the same “program”. It is me that is different as most of the time I did it as described above.

Soooooo…… that tells me that part has nothing to do with the problem…… :+1:

I also need to say!!! That I have done it both ways[no wise cracks I LOVE woman!].

I already mentioned that when I get Brand new batteries I make sure the Opus charges it from the beginning. Older batteries for the FIRST test I may have them charged, but no more than 4.10v so the opus can top it off to where it is accurate for ALL batteries and ALL capacity tests in the Opus.

However,the recent failures the batteries have all been mostly charged and then the Opus tops it off, goes to discharge and then charge.

Got it……. :+1:

Off Topic!

The mail use to come b/w 1 and 2pm,now after about 3 or 4 mailman changes over the years, It comes b/w 3 and 5! A Flashaholics nightmare! :person_facepalming:

I wanted to get this test done b/4 8 pm when I go on my nightly hike w/ Capo. Does not look like that will happen as it takes about 4 hours,it will take 1 hour just to top the batteries off!

ok,everything is in order!! Came 10 minutes ago,batteries charged in 2 minutes and went into discharge mode,It should be done ~ 7:45!

I will give a report when it’s done! I really hope this is the solution!

I bought 2 Power supplies in case one did not work!!!,the first one did not leave Calif. yet and I ordered that 12 hours before this one that came from Portland, Oregon!