Opus BT-C3100 not working out of the box


Unfortunately, when finding out it is not working, he just put it aside and wait so now it is over a year and no longer under a warranty

If you don't want to return it, that's fine, but "just bought" and "over a year" ago don't jive together.

You have to press buttons to get it to start charging.

Chris

After inserting the psu, the display light will light up, NULL will show on the empty bays and will turn off when nothing is inserted while still showing the same status on a darkened screen.

Inserting an 18650 (as an example) will turn on the display light again, and if no button is pressed within a few seconds, it will still commence Charging mode at the default of 500ma.

Btw, the screen’s display should stay in a darkened state while showing “NULL” in all four, presumably empty slots. If it does still stay fully-darkened even a when a healthy cell is inserted, perhaps then there is something wrong with it.

Are you sure the cell is fine?
For instance a protected cell may sort of lockout itself and will show as NULL when inserted in the charger.
Did you try various cells and specifically unprotected?

Read the comments below the video, maybe this will help. Good luck !

.

Thanks all for your replies, apparently I failed to described the problem.
Here is a short video showing side by side my working charger (on the right) and my friend's (on the left)
Hope it will explain the issue

https://www.youtube.com/embed/ewOOGbi8VYI

“He’s dead, Jim.”

Chris

Yeah, dead as in ded :frowning:

The video certainly shows there’s an issue with the charger. Curious to know where your friend bought the Opus from?

Throw it in the trash.
I had one that malfunctioned and charged my battery to over 5 volts.
Not worth keeping.
I prefer XTAR chargers.

The last 3 BT 3100 I bought had to update the fans in order to get a nonstop Discharge Cycle — They would overheat and pause several times for a 3000 mah cell

It turns out that resurrection is not a myth.

A little adhesive tape to put pressure on the screen brought the charger back to life.



:+1: :beer:

I had a Kyocera stick phone that would do that with its little postage stamp sized screen and I had all sorts of tissue padding taped to the back.

Congrats on figuring things out!

Chris

Great save YuvalS !! :+1:
Cannot beat a cheap fix ! :smiley:

My old crt TV used to do all sorts of vertical or horizontal picture hold problems and a slight tap on the ride side of the housing would bring it back to normal…though eventually even a mallet can’t bring it back to life.

Glad you were able to fix it YuvalS! Still strange that it didn’t work in the first place.

Not so strange.. It is poorly engineered.

This is the 2nd Opus charger I had to fix out of the box.

The first one had a defective power socket.

In addition my other Opus malfunctioned and almost got my house on fire.

Opus chargers are very low quality and I don't recommend anyone to buy it

My Opus BT-C3100 (version 2.0) that I’ve had since 2014 has been working flawlessly. Never had a problem with it, including the fan which is nice and quiet.

Maybe the quality has gotten bad, but it appears I got lucky with mine since so many people have had issues with them.

If mine ever goes bad, I will probably buy another one unless there’s another analyzing charger with the same features at a similar price.