With or without a cell Bay one only reads 4.88, and says full
I took all of the screws out, I did not see any burned areas on the board I looked all over. I put it all together still reads 4.88
What could cause it to read 4.88, it is almost like it must be reading the voltage that charges the cells, and it thinks I always have a cell inserted into bay one
Hey guys DO NOT INSERT BACKWARDS.
I purposely did it on bay two, it destroyed the entire unit.
I heard it short circuit. I recorded the event. 18 seconds in, you can hear it. I unplugged it quickly, I hope my cell is not destroyed. What do you guys think, is my cell safe? It was not hot
Part one, I almost couldn’t insert the cell the wrong way , I did the deed anyway
Part 2 it’s ruined
So the basic life lesson that we all take away from your misfortune, is that one should assume that any/all chargers lack reverse polarity protection AND that we should pay attention to which way we’re inserting our batteries/cells?
Do I have that correct?
Chris
Most decent chargers do have reverse polarity and short circuit protection. Strange that Opus does not, but its specs don’t list it so yeah I’d assume it doesn’t have it. Lesson is, read the feature list before buying.
Yep, I had this charger probably 4 years, not once did I inserted a battery wrong, until the other day. I figured it was ruined so I wanted to try again to be sure. And it’s definitely ruined now.
Direct out of the SkyRC MC3000 charger manual below in Q and A:
"Does the charger have built-in protection against reverse polarity, short circuitry,
overheat, overvoltage, overload, stupidity, ignorance, explorativity?
- Do not misuse, abuse, or mess around. The device was built for proper responsible usage" 
So, in case of user error, don’t make user errors! :person_facepalming:
Thank you SkyRC, that solves everything 
One of the reasons for the high price of the MC3000 charger is to support their comedic writers efforts to entertain us
‘Stupid’ IS supposed to hurt. It’s built into the evolutionary process.
Chris
Good thread, and thanks for the heads up! That could have been real bad.
No problem, I figured let people learn from my mistake. I had this one for years and never had an issue. One day I was staying up to late and trying to do too much and I made the mistake. I had to do it again to confirm.
The Opus does have RPP. Jake’s Opus is defective which was already established earlier on in the thread, prior to him trying it again.
Here’s mine with 4 batteries in backwards. Reverse Polarity Protection works fine. And always has
Most do, but for some reason mine failed, any one else’s unit could fail in the same manner. Up until this happened I had never taken mine apart.
Also, could it be because I had it on quick test mode, I would hate for someone to fry their unit to test, maybe quick test bypasses the reverse protection
Jakes opus seems to be slightly different, yours and mine has the opus logo on the top front but jakes doesn’t , maybe that’s got something to do with it ?
I’ve never heard of an Opus failing like that in the three years I’ve owned one. I think your situation is unique. I have 9 chargers. 1 Opus BT-C3100, 2 Miboxer C4-12’s, 2 Miboxer C2-4000, 2 Nitecore D2’s, 1 Nitecore D4, and a Nitecore UM-20. RPP works perfect on all of them.
Here’s all 4 batteries in backwards on “quick test”. RPP still works fine.
None of the sites I see on the Opus charger, lists polarity protection as a feature. Other chargers explicitly list it.
Maybe the Opus does support it, but why wouldn’t they advertise that feature? Or, maybe it’s hit & miss, not really properly implemented.
In any case, if it’s not listed as a feature, I wouldn’t mess around with it.
Because it’s not a flashlight. All chargers should have RPP. All that I’ve seen or used do.
Looks like Jake’s Opus is the old version 2.x versus the 2.2 which has been out for 3 years. HKJ’s old Opus v2 test unit looks just like Jakes without the Opus logo. Maybe RPP was non functional in the Old Opus chargers that aren’t sold anymore.
I have had mine at least 4 years, maybe they added that feature on the newer versions, I will likely end up buying a new one when I see them on sale. I can still shine on , I have other chargers, although that one was my favorite
Something happened for sure! I remember when vapers were buying these when they first came out. With as many flat tops as they charge on a daily basis, you’d think we’d have heard of this before. HKJ still has a few old versions. We should ask him to try blowing one up… lol
:student: strictly for education purposes.
I really think mine was definitely an original, not counterfeit or anything. It has had countless charge cycles. Always worked well. I wonder if mine was just faulty to begin with, and I never made the mistake of inserting backwards before?