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

Was your charge/test for your crappy 3100 w/ 4 X 18650 3400mAh @1 amp?

Does the Lite-on look like mine?!!! Same specs!

I tested cells I had on hand —not a quad of the same battery—but 4 cells charge /test @ 1amp
The LiteOn I found looks similar to that one—-I would imagine mine is quite a bit older—I think it came from an EMachine laptop I junked several years ago

So, googling, I find there’s an Opus C3400 v3.1 version for sale out there,
https://dc-workshop.com/opencart/index.php?route=product/product&product_id=50

and a couple of suggestions of a v3.2 (Russian language)

Has anyone found a list of the Opus charger products and specifications, to know what the different model and version numbers mean?

I wonder if they all come with the same iffy power supply.

From that “dc-workshop” review page, the spec includes

adatper [sic]

If you look at the two different models—you can see in the pictures the 3400 has a more square PS (Good One)
the 3100 has a more rounded PS (Bad One)

How soon we forget……. :wink:

3.1

-The 3.1 discharges to 3.1v instead of 2.8v. Here is the dealer answer to my question on Ebay:

New message from: rdana Top Rated Seller(31,011TurquoiseShooting Star)
Hi Capolini,
Yes, you are right. The discharge cut off was changed to 3.1V because most protect circuits are set at about 2.8V. So the charger could cause some cells to trip protect and the charger was getting the blame. There is no real industry standard for discharge cut off of Li-ion cells during test. 3.1V is a voltage used by many but some use 3.0V or even 2.8V. The C3400 will stay at 3.1V. I do not know what Opus will do with the C3100 V2.2. Many times they make the same change that I ask for in my chargers, but not always. Since the C3400 is manufactured only for me I will be keeping it at 3.1V. I wish that I could make the voltage selectable by the user but that may be some time off.
Thanks,
Robert

DC Workshop
PO Box 293804
Sacramento CA 95829-3804
United States

ebaysales@

sales@
danaco.net

www.datalucis.com
WWW.danaco.net

Notice the SAME guy[and only one who sells 3.1] as your link!
_

- It has already been established that the 2.1 and 2.2 versions use Different SMPS from different manufacturers. I mentioned this in an earlier post and provided info. as where to find it.

- I have no idea what SMPS the 3.1 uses.

I sent Robert[rdana] from ebay/dc workshop an email and asked him if he knows/could tell me the power supply that the 3.1 version is using.

I would be surprised if it is the same one for my 2.2v,then again it is ONLY discharging to 3.1v so that itself could make a difference in power surges needed for 4 X 18650.

When I hear back from him I will post it.

You still have not answered my last PM wolfdog!!!#???

BUT, it works just fine…. :slight_smile:
……no “resets” at all. Same as yours, if you find the sweet spot & don’t move it all is well. The adapter is a must have though. Glad we have them on the way. :slight_smile:

This seems to be a substantial power supply…… Nice heavy feel to it.

Done!!!..along w/ a beautiful bonus Picture that I took in Italy.

One of the first things I noticed was that SOLID feel to it.It is bigger than my Supernight…not by much. A 1/2” wider and a 1/4” longer.

Very interesting, thanks for looking into this by asking him

This is my power supply:

Edit: Only “brand” name I can find on it is “Made in China” :person_facepalming:

Yours is the same as mine. The only difference is the Plug! [European/USA]

The one that Gauss posted[APD WA-36A12U] IN POST # 152 seems to be of better quality and so far no one has mentioned problems w/ it.

Here is mine again so we do not have to go to post #150 again!

The bottom line is IF it works Ok,fine. If not you spend $10 for a much. much better quality one[Lite-On 12v/5.5a/66w].

For those that may have missed. The first cord I got w/ my Opus got way too hot and I exchanged it for the second one which could not do the CHARGE/TEST w/ out resetting!

Noooo! :disappointed:

Hope it keeps goin’ strong. Never noticed anything unusual with it yet, and it gets used at least twice a week.

I’ll have a preemptive search through my old-adapter-box-of-pandorra. See what it brings to light…

I did a LOT of charge/discharge tests. the reset[failure] always happened during transition from discharge to charge when the batteries were @ 2.8v and the SMPS apparently could not handle the spike of energy it needed. This was always w/ 4 X 18650 3400mAh batteries.

Yours may be fine if you just charge batteries 2x/week. I would hope you are not putting them in @ 2.8v!!!

It doesn’t have to be 3400 batteries. When I first brought this issue up it happens around 2.8-3.4ish volts. I test lots of laptop pulls, powertool pulls most of which are 1200-2200mah left. It causes the same spikes regardless of the capacity. Its the low voltage

But I’m glad you caught it early and got a fix. At first you said your didn’t do it like mine. Mine was like that at first. It took me a a couple months to actually realize something was going on. I figured my daughter did something or etc. And doesnt always happen. I think because when testing pack pulls the batteries finish at different times. Sometimes a few mins all the way to 30+ mins apart so the spiking isn’t the same as 4 batteries all switching within 5-10 mins of each other. I have 3 sets of 4 batteries that are married together. And even after a few hundred cycles now they still finish charging or discharging within a few mins of each other. It happens more when I charge these then anything else. I first noticed it during regular charge not charge test. 95% of the time it’s happened to me has been just putting 4 batteries in at 1 amp.

My opus gets used daily at least 6-10 batteries a day. If its a park night 20-30+ batteries. I beat the hell out of some batteries. That’s what’s great about pack pulls. They are free I can beat them hard for another 6-12 months and recycle them get more free pound them down and so on and save my 30q/hg2/ga/25r life cycles for when I want to use them. Hell I’ve found 2 brand new hg2 in the recycle bin because of a torn wrapper. Still tested at original capacity. Vtc5s with decent life. Laptop packs with one shorted cell others basically brand new. And plenty of packs that’s went back in the bin. But you would be surprised at what people put out for recycling. I’ve found most tool pack batteries are in great shape. Hadn’t had a real bad one yet. 99% of the time the circuit board fries from the heat. And tool pack batteries are 20+amp natreriesm 15l/20r/25r/hg2 etc I’m using the 25amp batteries from the 40volt ryobi packs I found a few weeks back for my vaping needs. Low capacity unfortunitly 1300mah. 42 out of 60 tested at or within 100mah the other 18 were completely shorted out. Most people saw Samsung in those packs but mine are LG work great I don’t vape over 8-9 amps anyways I never unplug my chsrgers. They stay connected 24/7 So it doesn’t happen enough to bother me. Something is being charged 24/7 But enough that I noticed a pattern. I’ll probably end up ordering a cord at some point. But its not high on my to do list. I’d rather buy a c8/x6 host for $10 at this point.

^

As I said before my failures ALWAYS happened shortly after transition from discharge to charge. That is the only time it happened.ALWAYS w/ 4 X 18650 3400mah. That could be a coincidence because most of my 4 cell torches run on 3400mah. It may have happened if I had 4 X 2600mAh batteries.

I am just glad that all of us shared this stuff and I am very happy w/ my Lite-On 12V/5.5A/66W SMPS! :+1: It is superb quality compared to the one Opus gives us.

I believe it’s happening due to charging 4 cells at 1amp on the most demanding part of the charge ( 2.8 —- ) I test lots of cells—many times I buy 20 cells ( for instance 30Qs) I test them then I make matched sets—when I charge test no matter how charged the cells are—Type of cells—etc— most of the time they never go to discharge at the same exact time—then again at the end of the discharge stage they never start charging at the exact same time— hope this makes some sort of sense to someone —-LOL

That has been my experience also[ 4 X 18650 3400 @1A]. Speed4goal has had a different experience!

Al I know is my dilemma is solved and my Lite-On SMPS works dandy!

My experience mirrors that of wolfdogs totally.
I concur with & “approve” everything he says……… :smiley: :beer:

I got my OPUS back in May 2016 from IMR Batteries. In June 2016 I started doing discharge tests with it and noticed the problem. I had a Lii 500 so I just quit using the OPUS for any discharge tests or charging very low batteries.

But glad all this has been brought to light……. The OPUS will go back into service. :wink:

Where is GAUSS163??? Have to give him some credit!!

My adapters from China arrived,the straight ones[picture to follow]. They got here in 1 week!!! :+1: I ordered them April 15th!

Very impressed and the connection is sound and secure!

I will certainly have enough of these. Two of these, 2 x 90 angle ones and a 10’ cable[emergency order!]